Lisa,
I also just bought a coffin top machine. Only paid $40 for it. It is in excellent condition except for the side leaf. It is broken but I hope to have it repaired someday.
My DD bought me a Singer Treadle, Serial # AE658095 for $50. It needs a belt and some cleaning.
I am going to buy another Singer Treadle on Wednesday for $75. It is in excellent working condition. They think the serial is H or M 1313112. It has 6 side drawers if that helps. I am so excited to be getting it!!!
My DD is also getting me a toy Singer from the 60's or 70's for Christmas. It is in mint condition, still in the box and has all the papers and things. It is $76. LOL!!
I told my DD that she has created a sewing machine addict with all of her enabling. LOL!!
Here are some pics of my treasures: