I have a feeling this has been asked about before, but it would be great if this possible. Just set up a shop sign for something that requires access, like a door. The sign would look like this: First line: PlayerName Second line: 1 Third line: B (your price) Fourth line: [access] And that's how you do it!
To make sure it has not been asked before, try searching for it in the "Search forum" and after searching in the Track, I find similar ideas. Pay to Pulse Otherwise, good idea.
I have been wanting this for a while now but never posted it. Until this maybe gets implemented, you can use the shop sign activates redstone pulse thing instead.
