The Hut have the Mega Drive collection for Xbox 360 for just over a tenner delivered. There's some code on the homepage for an extra quid off a £10+ spend so you could get it for 9.94 or some other stupid price, there are a fuckload of classics on there:
* Alex Kidd In The Enchanted Castle
* Alien Storm
* Altered Beast
* Beyond Oasis
* Bonanza Bros.
* Columns
* Comix Zone
* Decap Attack starring Chuck D. Head
* Dr. Robotnik's MBM
* Dynamite Headdy
* Ecco The Dolphin
* Ecco II: The Tides Of Time
* E-Swat
* Fatal Labyrinth
* Flicky
* Gain Ground
* Golden Axe I
* Golden Axe II
* Golden Axe III
* Kid Chameleon
* Phantasy Star II
* Phantasy Star III: Generations Of Doom
* Phantasy Star IV: The End Of The Millennium
* Ristar
* Shining In The Darkness
* Shining Force
* Shining Force 2
* Shinobi III: Return Of The Ninja Master
* Sonic 3D Blast
* Sonic And Knuckles
* Sonic Spinball
* Sonic The Hedgehog
* Sonic The Hedgehog 2
* Sonic The Hedgehog 3
* Streets Of Rage
* Streets Of Rage 2
* Streets Of Rage 3
* Super Thunder Blade
* Vectorman
* Vectorman 2