*RANT* OH MY GOD, WHY MAKE A TOPIC ABOUT THIS, IT'S BEEN SUGGESTED 500 TIMES! *RANT*
Because, I'm wondering if anyone would be able to mod this into the level editor, to make shops easy to set up:
Calm Shopkeeper - Is calm, and sitting in the one spot
*Shop Blocks - Smooth shop blocks..
* > If destroyed, any calm shopkeepers on the level go nuts. Also, if an idol is placed on these blocks, it gets cashed in for $5000
Buy-able Items - Create a new category like the Enemies and Traps categories, with buy-able items, which you place above shop tiles
* and can buy them in the custom level. Also, maybe press E on it in the level editor to adjust it's price in said level.
* If not placed directly above a shop tile, it turns into a normal item, without a cost. If the item is picked up and the spelunker goes onto normal tiles, without paying for it, any calm shopkeepers will go nuts.
Shop Signs - Gotta have shop signs.

(Not dice house signs, because they're gonna take a whole lot of different stuff to make, and have nothing to do with this idea. This idea is for
shops, not dice houses)
Lamps, Red and Yellow - I know they're in
Spelunky Editor Plus, but if this stuff gets put into a new mod, then you'd have to put lamps in again. Just listing this in case someone else decides to make a level editor extension.
I got this idea about an hour ago, so forgive me if I'm forgetting something important. I'm not good at memorizing things. It takes me about 7 minutes to copy (by typing) a 25 character long activation code for stuff..
Anyway.. If there are any holes in these ideas, please say so. Also, if you happen to think up fixes for these holes, please mention that as well.
What do you think?