Babylock sergers are good machines. Not knowing the price or the condition of the machine it's hard to say, but my 4-thread Babylock (BL 415 with differential feed) I bought nearly 20 years ago and cost me $800 new. I burned the motor out on it (operator error, don't ask) and have not had it repaired because I had bought another one in the meantime that did a cover hem, something I used a lot when I was sewing clothing. I was quoted a price of $250 to repair the old one and have hung onto it thinking I would have it repaired as a back-up. Any serger I could buy for $250 today would not come near the quality of the Babylock. It won't have all the bells and whistles, but it's worth looking into. By all means have a dealer look at it if they won't charge you a ton of money just to open it up. There are plenty of vintage machines out there that are decades old and still run great.