I bought the Gears of War 3 XBox 360 special edition for like £450 or something. As for a game or a special edition of a game, probably the same game, but it came with a statue and other goodies, was about £120 or something.
I bought the GTA IV special edition, came with a duffle bag, lockbox (still have it), map, and other stuff. Think it was close to or over £100 (memory ain't to clear on that)
I imported Silent Hill Homecoming from the U.S., and the price got stupid. Was about $50 feom GameStop, then got charged for using my card outside of the country, so another, roughly, $8. THEN, I got slapped with an import tax of about £28 / $60 ish. So all in all, it cost me about £78 for a game that was sold for £40.
Also bought the Duke Nukem Forever special edition which came with a bust of Dukes head and don't remember what else, cost a fair bit, not including the disappointment tax.
Thinking about it, games on their own used cost me £65-70 when the 360 was fresh out, but they eventually dropped soon enough to around £50 in store (online shopping wasn't that big for me back then) Was crazy expensive, but at least I could trade in old games for credit. The absolute worst game I've ever ever ever bought and tried to play was £70 and it was called Vampire Rain. I was between jobs too so it hurt so bad. Good times...