I sell small amounts of electronic components type stuff on Trade Me.
I also show my trade me listings on a non-trademe site, predominantly this is a "gallery" of my trade me listings with perma-links (eg "Stackable-Arduino-Header-Set-12.html") to product info, and appropriate links to the Trade Me listings for purchasing.
I get a reasonably consistent number of eyeballs daily on my non-trademe site from organic searches, from persons located in NZ.
I'm considering adding a standard checkout process on my non-trademe site, but it's a little complicated to do the stock management so as to not leave the trademe listings short-stocked, so trying to decide if it's worth it.
So, if you stumbled across a gallery site like mine, would you be put-off by being directed to purchase the items on Trademe, rather than a more typical checkout?