My first Chromebook and what a deal it was. Original price of $299. On clearance for $59.
Shows price of $159 on their website but their keeping sale price a secret.
If you show a salesperson a Brickseek link, there's nothing they could do about the information displayed by Brickseek and resolving your item issue - and I've heard of stories where the salesperson becomes less helpful. You can't price-match with Brickseek so if you find this Chromebook at for regular price at any retailer, you won't be able to get it for the location-specific clearance price. And even it shows the $59 price for that particular Walmart and you find it at that Walmart but it rings up regular price, you won't be getting it for $59.
There's a remote possibility, but it seems unlikely for a Chromebook of that generation. Google has recently been prolonging software update support for more recent Chromebooks, but it depends on the chipset used in the devices.
Linux might be an option, but I don't have experience with that on a Chromebook. I've seen some articles about installing Neverware's CloudReady on a Chromebook, but I think that's pretty involved, and not very stable.