Hi John-
I'm not sure what the site management might have to say, but it seems reasonable to me. While I don't think we want you to generally post your entire inventory here (unless you're offering big discounts to our members!!! ), I don't see your post as commercially aggressive. If one of us had seen that bass on your website, we probably would have posted a link to it, albeit on the Seen on craigslist, eBay, and elsewhere section of the swap and shop boards. As you seem to be an Alembic owner at a personal level, there's no reason we should hold it against you that you also own a music store! I'm sure a slippery slope argument could be made here, but I believe we should burn that bridge if we come to it and allow any listing of used Alembic gear from any source.
Good luck with the sale. That's a pretty fair price for a bass that is way more than a simple Essence.
-bob