If the player has the amount of gold indicated on the shop and stands on the front of the shop, the display changes to "SOLD!" and the force field is withdrawn to allow access to the sale item.
If the player has insufficient money, the display says "NO SALE!" and a negative sound cue plays.
If ghost mode is used, you still cannot get the item without paying for it.
If a shop is spawned in the gearworks room on the small ledge behind the long horizontal turbo tunnel, it is possible to use the lip of the shop to jump up onto the ledge. This is normally impossible to do without some kind of jumping assistance.