There are a few people that offer nice shave ready options for specific razors or you will see plenty of vintage and non razors up for sale on the boards that are shave ready also. I grabbed a vintage razor that was honed prior to shipping that I received yesterday and it did the arm hair test wonderfully, now just waiting on my strop from SRD to arrive and I will get cracking.
+1 Or, since you are say you want one to learn with, I suggest the "sight unseen flawed razor" from whipped dog. $28.00