[issdaol (Phil)]

It sounds like your relative has a fair general idea what he might want based on your posts.

A non-cash voucher at a place like Bintel would mean that he has to go there and choose the scope and cannot get the cash.

So essentially the money has already been spent and you are taking him on a "surprise" trip to the shop. You can pretend you are going elsewhere or just going there to look so the surprise factor is still there and he has to leave with the scope in hand (or ordered) as he cant get the money back.

This way you achieve the surprise you want and he gets the scope that best suit's his preferences without all the guesswork or possible mistakes.