The RV-2 normally sells for around $80-$90 but it is rare to see them boxed so this will add to the price. I know that one was recently sold for $225 but that's serisouly overpriced. I'd expect to pay around $100-$110 for it.
they've been going used on ebay, in good/near mint condition for about 100, but there are a lot there so some go for 70ish...but with the box, I'm sure it would command more.