On another ID I found that if I had a good run of sales they often rewarded me by lifting my limits. I didn't link that ID to my main account and just waited patiently because I didn't want to list heaps for a start anyway.

You could always try opening a second ID but you'd have to start with only 10 listings and it'd take a while to get established. The sooner you start, the sooner the second ID would grow though.