I can personally state that pro-v definitely has this quality. At 25mg a day, I have found it to be a mild aphrodesiac. At 50mg a day, it definitely stimulates the libido, keeps most water off your body, and helps you stay hard in more ways than one. For real fellas, this is no joke. I had a mild problem a few times having to allow sails to come back down from...sailing. Seriously, the effect of pro-v on male erection is documented in the medical listing and profile of pro-v. This does not mean it will happen to everyone, or to the same effect. It is like every other drug with respect to how sensitive you are to its various affects. Know that this is a relatively common effect of the drug and that pro-v will probably have an effect on you in this manner to some degree. Just don't overdose.
In general, Proviron is a relatively inexpensive and easily located product to find. Pharmaceutical grade Proviron is always going to be more expensive than the underground counterpart, but that is the way things go for almost all pharmaceutical products versus UGL-manufactured items. Schering Proviron in particular sells, on average, for around $ per tablet (25mg). Other pharmaceutical brands of Proviron can be lower priced, with some ranging around $ per tablet. Underground grade Proviron is known to be much cheaper for obvious reasons, with some being sold for as low as $ per tablet (25mg). Underground products are not manufactured to any standard, however, and some brands may manufacture tablets in different concentrations (20mg, 25mg, 50mg, or even 100mg), and so it can become quite difficult to gauge and judge current market prices because of this.