It's not a hassle selling on there, as long as you grade it properly and aim your price right then it's relatively easy. The only downside is being a first time seller usually puts some people off. Especially if it is a high price. It's never been an issue with me though.
If I wanted to shift on my unopened and mint Violator box set, which goes for a grand and upwards, I'd probably sell it for around 800 quid...that's still a huge mark up on the 130 quid I paid for it. The trick is to not be greedy. It's only worth what people will pay for it.
What's the album?