I've noticed that seller with the $500 Military Champ has been buying up & reselling O&R stuff, the Champ was bought two days earlier for $400, which is still $100 more than I've seen them sell for before. They also seem to be separating tanks & gearboxes from some engines and appear to have split up several Chicken Power kits.
I've been wondering if O&R's have been featured on one of those shed/garage clearance type TV programmes (where they often make up daft estimated selling prices on stuff you know isn't worth that much) as prices have indeed been getting very high recently.
Note that ebay is a bit dishonest with the prices that items with best offer sold for, they stopped showing the actual lower sold price a few years ago, but you can still find out the actual sold price by using the best offer history tool on goofbid, it only works with recently sold items though.
I was also surprised that the 350W Tiny Tiger made nearly $600 as it failed to sell the previous time at an auction start price of $300 with $400 buy-it-now!!!
David