$ Mark up on imported Chinese goods

Hi all,

I recently discovered this forum and it has been a huge help. Like many people on here, I am investigating the possibilities & opportunities of importing goods from China and selling on at a profit - aren't we all ;-). At a high level I understand how this is done in relation to finding a niche in the market, sourcing the product and the logistics of getting the same product from supplier to the market. My one question (at this time anyway) is this. Are there guidelines out there on how much I can or should mark up my imported goods before I sell them on wholesale to a prospective buyer. I know this is a "how long is a piece of string" type question but would really appreciate any help or advice on this question. Many thanks in advance!