PFAFF Hobbylock 788 Serger Overlock Sewing Machine Needs Serviced

Good used condition, powers on, when you push the pedal it runs of a bit then it locks up. I think with a good servicing it will work just fine. Will allow a 30 day return on this machine. I got this machine at an estate sale. No visible damage on case. Some yellowing of the plastic. There is a service tag on this machine. Has been a while since it was serviced. Was informed that it did sit for quite a few years without being used. Note- there are spindle holders for only 2 of the 4 spindle locations.