I would pay! Not sure how much is reasonable...but let's say if they charge a flat rate of $25 for my entire stay, sure I'm happy to pay!
I think this is the service I miss the most. Honestly, I would probably buy more if they bring it back. I tend to buy most merch towards the end of the day when we know we are done w/ rides, so that leaves a lot of time for me to think about if I really want certain items, or I might forget about them all together. If I could send them to my resort, then I would buy right away.