Your question is difficult to answer because there are so many variables involved in discussing LMSes. Do you need expandability, standards compliance, support, etc.
There are low cost LMS systems you can look at.
This link:
http://www.brandonhall.com/public/publi ... owcostlms/ takes you to Brandon Hall's website and a review of 17 low cost LMSes. Of course the cost of the report is a bit pricey.
This link:
http://www.e-learningconsulting.com/pro ... ystem.html takes you to a simple LMS that is $1,000 for up to 100 users.
You could also do a search for a hosted LMS solution that might be cost-effective for you.
As you can see, there are a tremendously wide variance of capabilities, styles, etc.
I think the best thing to do would be to take a real careful analysis of what you want to do with the LMS, the functionality you need, the cost you ware willing to live with, and what your future needs might be, and then you should be able to better determine what types of LMSes might work for you.l