I don't know if I can make it more clear. TO ME, your auction APPEARS to have shill bidders.
There are plenty of ebay sellers with stellar feedback that regularly have shill bid auctions, so your ebay feedback means very little, esp since the majority of it comes as a buyer and not a seller. I am not saying YOU have done any shill bidding, but the bid history makes this auction appear to have been overly inflated by a select few low number bidders. This is a prime symptom of shill bidding. Either way, I advise my friends to pull out on this auction as it appears to be fishy.
My particular issue is that you have no qualms with paying ebay and paypal to sell your game via those channels, yet you take advantage of free pinside advertising and never even offered the game for sale here. There is no requirement to donate to pinside, but it does seem quite obvious that pinside is nothing more than an avenue for you to take, take, take.
The irony is that FG is a hot game lately and if you had offered it up directly for sale here you would likely have ended up with more $$$ in the long run.
Don't expect to pimp your auction here and then not have comments.