Hello, first post here

I work for a gunshop in the south east (UK) and we often get asked about airsoft, we currently only sell shotguns and air weapons (as an RFD) but I would like to prove to the management that airsoft is a hugely popular sport and something we should look in to. So...... you guys are the best people to enlighten a complete noob. Can you give me an idea of the sort of equipment you would like to see a shop stock?
what frustrates you about your existing store? please be as honest and as descriptive as possible. You guys are the experts, I have very little knowledge other than the UK legal side of things. Your advice is massively appreciated!