if you were to advertise on the internet you should look into something that would only be temporary (unless you plan on doing this for a while and not just the holidays). First thing i would look into is something like Craigslist. That is free (i'm pretty sure) and accessible to thousands of viewers everyday. You could look at other places online like buying a space in yellowbook, or maybe spending some money to come up on google searches, but i'm sure those are rather expensive.
If you have some time on your hands, you could create a myspace or facebook and let people know what products you offer (although you don't want to be too pushy because it could lead to spam issues). I would definitely reccommend craigslist though for sure.
hope this helps