I bought a Brother XR4040 refurbished (listed like that because it wasn't new.). Great machine. Was selling on Amazon for $149, I bought it on ebay $69, plus shipping, spent $129.
It is computerized, but has no bells or whistles. A thing that annoys me about it... you have to crank the wheel to get the thread up top -- to finish the cycle. If I don't do that it is a tangled mess.
I bought it for a lightweight machine to take to classes I might subscribe to.