1990 Buick Lesabre Custom Sedan 4-door 3.8l on 2040-cars

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Buick Avenir concept struts into Motown

We love auto show surprises, and Buick has already gifted us a sparkly package on the eve of the 2015 Detroit Auto Show. Dubbed Avenir, this four-door concept is said to signal the future of the Trishield brand by previewing a possible flagship sedan. Incorporating time-honored Buick design hallmarks like the sweep-spear profile, Ventiports, and even a subtle boattail rear-end, the four-place sedan is powered by a surprisingly real-world powertrain – namely a next-generation V6 with cylinder deactivation and stop/start, with the most interesting part of the driveline arguably being a "twin-clutch all-wheel-drive system" and a nine-speed automatic gearbox with paddle shifters. Make no mistake, this is a big car. At 204.5 inches long, it's longer than a standard-wheelbase Cadillac Escalade – a span that's emphasized by the car's long hood and waterfall grille – though it's not quite as wide. While clearly a showcar, the beautifully crafted interior looks largely produceable, including attributes like a next-generation 12-inch touchscreen infotainment system and 4G LTE wifi, but we suspect a production car would pick up a third rear seatbelt and give away some of its flowing contours that are said to have been "inspired by nature and sea waves receding on a beach." No word yet on whether there's actually a showroom future for a car like this – it could simply be an exercise designed to test the waters for a next-generation LaCrosse. After all, sedans aren't exactly popular concept fodder these days, especially as crossovers continue to eat into traditional sedan sales in many of the world's markets. However, China still loves the coddling rear seats of a proper four-door sedan (which in this case include silk and bamboo elements), and with a majority of Buick sales happening in the People's Republic, the Asian nation controls the destiny of this General Motors brand. Said another way? Anything is possible, especially with General Motors known to be working on a large flagship sedan for Cadillac already – the Avenir is reportedly based on the same Omega architecture that will underpin the forthcoming CT6. What do you think? Is this a promising direction for the resurgent Buick? Scroll through our gallery, check out the video, and then have your say in Comments.

This 1988 Buick LeSabre Estate Wagon looks like a boxy, wood-sided bargain

The growing interest in 1980s cars has meant that General Motors' full-size B-body station wagons of the era are now attracting the interest of collectors as well as iconoclasts seeking an SUV alternative. This 1988 Buick LeSabre Estate Wagon for sale right now on eBay Motors, looks to be a tempting example of the genre. It has covered just 72,000 miles and is described as a "rust-free southern car." The A/C is said to be cold, and it's equipped with power windows, a split-bench front seat and a rear-facing third seat. Whereas the Electra was the wagon for the finest estates, the LeSabre presumably was for those that were one rung down, so it has a slightly more downmarket maroon cloth interior where the Electra would have velour. Yet this LeSabre Estate Wagon is still slathered in a full complement of woodgrain siding, and this car sports a factory set of wire wheel covers. We're told the 5.0-liter V8 sound great, while the paint is said to be "a little tired" and one headlight looks like it needs to be replaced. The "Buy It Now" price is $8,500, and the seller is also inviting offers. Plus, 1% of the sales price benefits St. Jude's Children's Research Hospital, so there's a feel-good factor. For comparison, this wagon's Oldsmobile twin currently being auctioned on Bring a Trailer already has been bid past $8,900 for four days still to go in the auction. This '83 Custom Cruiser has 74,000 miles and looks maybe a little spiffier, but not a lot more so. The seller of this Oldsmobile includes a video in his listing, and in it he appears to be not wearing pants. Sometimes it's all about presentation. Related Video:

Watch 14 hot rides take over concept car lawn at Pebble Beach

The Pebble Beach Concours d'Elegance is an annual celebration of the beautiful, old cars that grace Monterey Car Week. But Monterey – and Pebble – features lots of newer metal, too, and that includes the concept lawn at Pebble Beach. Now, "concept lawn" isn't a totally accurate name anymore, and you'll see why in the list below. This year especially, plenty of production cars can be found in the area once reserved for the conceptual. Still, we're happy to see them. Here's what's featured this year: Alfa Romeo 4C Spider Audi R8 BAC Mono Bentley EXP 10 Speed 6 BMW 3.0 CSL Hommage R Buick Avenir Galpin-Fisker Rocket Speedster Hyundai HCD-16 Vision G Coupe Icona Volcano Infiniti Q60 Lamborghini Asterion LPI 910-4 Maserati Ghibli McLaren 570S Rolls-Royce Wraith By our count, that's seven concepts out of fourteen cars. But it still makes for one hot group of metal. Check 'em out in the gallery above. Related Video: Related Gallery 2015 Pebble Beach Concept Car Lawn View 38 Photos Image Credit: Copyright 2015 Drew Phillips / AOL Design/Style Alfa Romeo Audi Bentley Buick Infiniti Lamborghini Lincoln McLaren Porsche Concept Cars Videos Original Video Pebble Beach