Dude if you tell the guy at the smoke shop that wou just woke up and grabbed your keys and a small wad of cash (like $40-50), most of the time
A) You don't get IDed
B) You get the pipe you want if you give him all your cash

As for a 30-40 dollar pipe?
If you see the one in the pic I posted, that was 60 but I only had 40 on me, so I paid 40 (and the guy put it right in his posket, lol)... if you want one that's smaller and easily hidden you'd get off for like $10-20