Strange as it seems, artwork does sell well on eBay:
http://tinyurl.com/5f2o8q
You can also try local galleries, craft shops, upmarket coffee shops and so on to see if you can display them for sale, giving the outlet owner a per centage.
All these ideas have very little financial outlay.
Does your town have a gallery market, that rents space to antique sellers, artists, craft workers and so on? That might be an idea but will usually need a deposit and a contract of a few months - and of course you will need to commit a certain amount of time to that.
Take time now to research the market - see how your paintings are different to the ones availaible quite cheaply in large homestyle outlets, for example.