You can get at a sex store. I was with some recently who brought one & OMG!!

I went with alldaychemist.com, had no issues.  I went with the suhagra 50 mg tablet.  I only take half at a time, and it works for me very well.  basically got 40 tablets for 25 bucks plus shipping.  I have never used brand name viagra, so I don't have a comparison.  

I did an order at alldaychemist.  I'm too lazy and cheap to get a prescription.  Alldaychemist says you need a prescription.  I just didn't fill in the information and they sent it anyhow.  Seems to work okay.

And where do younget it?

I have purchased in Uptown Rhino 7 and found it works as well or better then Viagra  
Was told by a local provider about it /
As an alternative that I am more comfortable  with ----got a perscrition for 70 of the 20 mg sildenadil  pills with11 refills from my urologist and have been able to purchase  at Sam's   club with their plus membership for 20 dollar s
Much more with regular membership.
Told same price available at Costco.
Can pay cash, no paper trail, and no insurance .
Also when you see you doctor ask for samples. They can only say no or they do not have any.

Sildenafil is pretty much exactly what Viagra is, but they prescribe it at lower doses for other conditions.  Compared to Viagra it is dirt cheap.  Comes in 20mg pills.  Pop about 3 or 4 and you're good to go.