I bought Plesk Licenses and I'm satisfied...
When needed Plesk License with reasonable prices, CPLicense were definitely the cheapest one. I thought, if they were official as can never be too sure, but after a quick search i was sure they are listed as an official reseller on Plesk's own website. So proceeded to buy and move my existing licenses in total 17 (VPS and Dedicated), and in a short time they were activated perfectly on my servers. You get access to activation after placing order directly. Management page is pretty easy to use and manage licenses. It's possible to change IP address. Billing/payment systems works seamless. Support responds fast and offer help in case I needed. Very fast response.