Messages to sellers you had not bid or purchased anything from, right?
I believe the limit is 5 messages to sellers you have not had any transactions with. Give it a try today, should work now.
Well yes you said you was not spamming but it sure dose look like it to them. 20 message with 20 questions? why not just sent it in one message? If you was trying to buy from me asking this many questions I don't think I would even answer you back. You sound like a hard customer to please. ( scarring me away ) Also if you have this many questions about an item on eBay the best bet is to not even get the item.
It wasn't to the same seller, it was to several different sellers. I was just looking to find out what the limit was so that I don't hit it again, not be barraged for asking questions on eBay.