Hi there,
I think web site templates are hard to earn but it depends on your marketing technique. I just design a web site template for US$75 all paid by credit card, but offers like this come once in blue moon. It was a repeat customer.
I suggest you sell ebooks instead with re-sell rights.
I have some sites you might be interested to look at below:
http://tsldesigns.com/ebooks/ism.htm
http://tsldesigns.com/ebooks/expertaffiliate.htm
http://tsldesigns.com/ebooks/mdemails.htm
If you need more information you can email me admin@tsldesigns.com
Hope this helps.
regards,
SL Tan