Shop plugin?

What is a good very good shop plugin for minecraft? So e.g. If you right-click-buy and left-click-sell. You should be able to set up the shop ingame. The items in the shop should never expire. I use an economy plugin. Who knows a good shop plugin?

Boss shop. But I don't know why it has to be left click and right click.

Can also be different

I think Boss Shop is best.

Chestshop is a very well functioning shop plugin, however boxes are needed here. Only the adminshop can be created without.

Items for players, if created by them, basically expire when there are no longer enough. Otherwise it makes no sense. Only the adminshop never gets empty.

Chestshop allows right / left click on a sign.

I don't know of a plugin that works with items. As far as I know none of them are currently being developed further.