In that case, you have two problems:
1. Finding buyers/distributors who will accept inferior goods (i.e. no cert),
2. The risk of regulators discovering your product is out of compliance and taking action (blocking the device at customs, or taking fines).
#1 is easily solved with a direct sale to end user. No one checks, and no one cares (until it affects them, or someone else).
#2 is harder to deal with. I wouldn't think the expected cost is very much, for a quantity that low. But the worst-case cost can be quite high. That might be the kind of thing business insurance can cover, but that's rather expensive already, so you'd be better off doing it your own way (save up some cash to cover possible expenses), or just getting it tested.
Tim