Here are a couple sites that will help you with your question -

http://blog.venturepact.com/ebook-outsourcing-101-how-when-where-to-outsource

http://www.slideshare.net/RandyRayess/hourly-software-developer-rates-by-country

Hourly rates vary a lot depending on the quality of the developer so its hard to say how good a developer is just from a range of experience. The second component is that offshore developers will have different costs of living depending on which city you outsource to.

The first thing I would do is vet the developer to make sure they are really great at what they do. Then based on location and experience talented offshore developers will charge from as low as $40 per hour up to around $100 per hour.

But again I would focus first on vetting the developers to ensure that they are really great beyond just the '3-5 years of experience' as that does not actually say how good they are. You will find some developers that have coded for 2 years full time and have really dedicated themselves to it to be better than other developers that claim that they have 5 years of experience. # of years of experience alone is not sufficient to make a decision regarding whether or not the developer is really good.