i am new to serging--and frankly don't know what threads do what stitches. i am hoping to find an inexpensive (probably used) serger. My main machine is a Bernina 630E--(so i blew the budget on that!)...

what features should i look for in a serger? should i stick with Bernina for any synergy between the features/usage/accessories of my main machine?

any suggestions on where to find a good deal on a used serger?

any recommendations on the 'need' for coverstitch capability? :?:

thanks for any suggestions!!