if its pre-order. I'd order it ! can always cancel .
my reasoning , firstly stock levels... ryzen 3000 is expected to be huge and its a global release for ryzen , resellers will sell stock in July .
Like intel, demand will outstrip supply and then resellers like OCUK once they have gotten rid of their first batch of in-stock or first batch pre-order can increase pricing above recommended resell price. Distributors aren't allowed to do this, but they are allocated stock and then told who can have them!
If its pre-order and first reviews come out and arent to great, can cancel or send back the CPU within 14 days un-opened etc .
One distributor was looking to increase their warehouse or buy a second purely because of AMD and Q3/4 hardware releases such as Corsairs new water gear which is fantastic
Its the boards that will be the reviews your truly looking out for . how they perform, features , looks etc