Thanks for all your replies.
I work from home or mobile and I have a few students interested since the university is literally 5 mins or less from where I live.
I have only started investing in this a few months ago, so I can't really say I have a great collection of stuff, certainly not as much as I'd wish. Here shellac and gel polish are the hot topic so I started with that and I also offer gel enhancements. So getting a slightly cheaper but good quality product would build up my collection fast and correspond to that particular group.
But there are so many "nail techs" out there using bluesky and similar lines and offer very cheap nails that my prices seem high. Even one of the local nail suppliers has young nails and oulac, which he offers as a cheaper option at 5€ (2-3 quid?) a bottle. And that's supposed to be professional! That girl told me she usually pays 20€ (that should be around 16-17 quid) for a full set of gel overlays with gel polish and extensive nail art on all nails!!!! Not to mention the standard price of no-cuticle shellac at 9€(6-7 quid) and yes, no-cuticle: that's a thing here, even in nail salons! I'm ranting I know, I'll stop!
I don't want to try ebay. I do want to get a cheaper line, but not a bad one. And I have a uv light that I got from a beauty event (not sure how you call them) so I wouldn't have to get a lamp directly. That and no rent should help a bit. I'll look into Ink London and try to calculate everything with the % discount option. Thanks