The other big benefit to legalization for the consumer, outside of just availability, is that you introduce the concept of service to the industry. For example, here in the state of Illinois (where medical has recently become legal, though for a stupidly narrow set of conditions), the store prices are actually the same, and sometimes more, than the street prices. This is largely because the ridiculously strict guidelines has created too-small of a possible consumer base to give dispensaries the amount of business they'd need to set lower prices, but I still think it's a net gain because:
1. Convenience. No phone calls/weird meet-ups/etc. You can just make a stop on your way home from work and that's that.
2. More targeted purchases. With a medical/retail-level of quality, you can start purchasing to get specific experiences, rather than trusting your dealer, or simply rolling the dice.
3. Again, actual customer service. You're getting friendly, helpful experts to assist you in having a good time. And even if you're not? You can decide to become a patron elsewhere and just pull up the next closest store on Yelp.
4. Quality. This is by far the biggest advantage. You're just getting better stuff through legal channels, no doubt about it.
Like I said before, once you experience things this way, it really hammers home how simple this decision should be.