I'm currently selling N.E. leases for $19.95 USD, and exclusives from $99 - $149. Here's a few strategies that I have used.
1) Don't advertise your prices. I cite them when asked in a private msg/email, but I don't post them up anywhere. Why? First, you can discriminate, and charge different people different prices depending on your feel for the situation. I'd sell a non-exclusive for $0.25 if I could (why not?) but advertising your beats as $0.25 beats will do nothing good for your brand. That is key, managing your brand.
Maybe you're at a point where you don't think people will pay more than $5 for your beats. It's far, far better not to list your prices, and to simply state something like "For affordable leasing rates, contact me via email/msg" than "$5 LEASES!!!" which will make you look cheap, and if you ever want to be considered as more than a $5 producer you're damaging your brand.
2) DISCRIMINATE. As mentioned before, why charge everyone the same price? If you feel that an artist is very frugal or uncertain about your product, lower your prices a bit. If you feel that you have leverage, increase your prices. Point (1) is vital is making this happen.
3) Start Low. If you don't have experience selling your beats, it is extremely difficult to gauge their value without bias. Having informed friends is definitely a big helper, but IMO it's easier and less discouraging to start low and work your way up.
4) BE FLEXIBLE. Negotiate. If your selling non-exclusives, your supply is unlimited. If you have a chance to sell more than beat, give discounts. Offer the beats track by track if requested, and in any format.
5) ADD VALUE. If you are good at mixing/mastering, offer your services, free, for anything he/she does with the track. Even if they decline your offering will have more value and you can justify your prices.