It reads just like a grammatically correct version of what I call business spam. I don't know if it will help, but maybe..

Hello,

My name is Michael Althauser, and I would like to discuss the possibility of your store carrying my hand made dice bags.

(or wording to the equivelent)

Then put in all the stuff about who you are and the attributes of your dice bags etcetera. Also I suggest you change the subject to something like "Inquiry: Handmade Dice Bags?" or something else that suggests you have a question.

It sounds like you possibly sent the one email to all the recipients at the same time. while that's a valid way to send things, sometimes emails with multiple recipients in the To: field get tagged as spam in some email clients or mail servers.

It might help to either mail out individual emails, or if there's a lot, simply put them all in the BCC field. That way the people at the other end aren't seeing the email addresses or names of all the other stores you sent it to, and the email client program they're using may not flag it as spam.

Also, your message might be getting canned because of the link to your drawstring bags. If the spam filter is set just high enough, web links will trigger them. Especially long links. Not sure what to suggest here, since using a URL shortener will trigger the person's "OMG! I don't want a virus!" mechanism, and the link is kinda critical.

Which email client or webmail site are you using to send the email?

You might also try sending a shortened link to your dice bags with something like tinyURL. Individual emails are definitely the way to go, you're doing the right thing. The only reason I can see that you might be triggering spam filters is your subject line and content, and I think the aforementioned advice on changing your text is good.