[owyn]

There are a lot of weird edge cases I need to work around.

This sounds like a potentially more valuable product to me. Any time I find myself doing integration work like that in an e-commerce setting I think "hm, could this be the Stripe of X".

[_n7kw]

Yep, I've definitely thought about it. There's only one other company in the UK that does this. They supply their feed/API as a service to nearly all the big comparison sites.