Looking for Suggestions on Prize Support for Locals

Been helping run local play at my LGS for just shy of a year now and looking topush on doing prize support of some kinda but I am unsure of what direction to go. We have had 8+ players before, but in more recent months it's dwindled down to highest being about 6 or 7 folk and I guess due to the lack of prize support. I don't think the shop owner is keen on doing Cash Prizing, though there are other locals that happen within the week further out from us where most of our group is situated that do give out Cash Prizing for weekly play. As it stands currently we are at £5 entry and no returns from it. 

I'm looking at alterntive ideas for prizing that are not Cash related. It's difficult to even try and do something like Random Boosters as the stock is infrequent aswell.