dont think your gonna get enough chips to assemble any type of playable set but the single chip collectors would know better than i if you could salvage 5 or 10 chips that have a decent collectible value then maybe its worth it but then there is that debate about how many chips of that certain type are known......someone unearths a few racks and the value may decline but the condition would still be difficult to compete with non-buried chips prolly.......
there was a story about some Travelodge Las Vegas chips that carried a good value since there was little known available.....but then they dug up some site in Vegas and and found a ton of them and were actually filling 5 gallon buckets full of em.....i will look for the pics...sort of cool, unless you bought some Travelodge chips a month earlier....here you go found the story
http://nevadamag.blogspot.com/2011/08/travelodge-chips-unearthed-in-carson.html
edit: ok Carson City not vegas