Selling store credit or gift cards for 3% of the account's value really makes it seem like people won't be able to use it. You say referral revenue, which means the referrals may not be legit and the account could get closed or the money taken away. Something to consider for future buyers.
Selling it that cheap because I really need the btc and because it's a hard sell for me, if it were an amazon gift card I'd raise the value a lot more but since it deals with a very specific service that I'm not really sure who would be interested in buying, I'm selling it for cheap. If a really trusted forum member decides to buy it I would be willing to let them test out the account and funds for a week or so before they send me any btc as well. I can also assure all referrals are legit. I'd make this trade as painless as possible. Not here to scam.
It is a very niche thing you're selling this is true. I think your price point is very good considering that. Hard part is finding somebody who wants to buy glass art to either decorate with or try and resell. Be careful letting somebody use the account first, everybody needs to be safe in the transaction.