A number of folks have raised the question of building their own music library website for selling music. There are a number of eCommerce solutions out there but not many that work well with production type music. Below are three, from free to wildly expensive. I currently use LicenseQuote (ArtMunsonMusic.com) and yes they are an advertiser but I would use them if they were not. I find them reasonable priced, particularly if you are technically minded and pair it with an Amazon S3 account.
Here’s what I know of so far. If you have any suggestions to add to this list please let me know in the comment section.