Depending on the condition of the suit, I'd say anywhere between $500 and $1500. Of course, that's assuming it's complete and nothing's broken. If it's been completely trimmed and is ready for wear, paying near the upper end is to be expected.
If it's already trimmed, it'll help to find out how tall the guy it was trimmed for was. If he was shorter than you, it might look weird.
Does it come with shoes? What size?
BTW, that's the wrong blaster.