It really is a case of BUYER BEWARE with Ebay - especially with Professional Products. As Tilly Ann said, if you're after L&P etc, apart from the fact they shouldn't be posting monomer using normal mail (hazardous), unless the items are factory sealed (rarely, if ever) - you don't know for sure what you're getting. Someone could be advertising CND powders but just filled up the pot with cheap and nasty stuff - you really can't be sure. You're much better saving up a little extra to buy from a reputable company, at least you can be certain then that what you are putting on your client's nails isn't some nasty contaminated product.
Regarding other items - there's lots of bargains to be had out there - I buy and sell all the time. I've been stung badly once by (£170!) by someone who still sells on there - just changes her username everytime her feedback gets too bad, so you really do need to be careful. Read the feedback carefully and read the item description thoroughly - especially any small print..... you'd be amazed at how many people think they are paying for a particular item and then just get an emailed list of where they can buy the item from!
Just be careful, avoid anyone who has a lot of bad feedback - especially if they have made that feedback private so that you can't read the comments.
Jackie
Liberty Nail Design