I was curious about this, so I searched for all items in "chips" and then sorted by highest price. These are the top 3 buyers (not sold, reserve not met, private auctions, not included).

Hard Rock Coldplay Error $5 chip---$4050
Winner: diamond5001 / 570 Positive, 0 Negative

Vintage Clay Gaming Chips 1930's---$3056
Winner: buydelll / 208 Positive, 0 Negative

Great Casino Chip Collection- 440 Chips---$2000
Winner: jcgamble921 / 1066 Positive, 5 Negative