CanoePam

i second the recommendation for an old Singer straight stitch only, something earlier than 1960. Very cheap $25-50 is not uncommon). However, depending on what you are sewing a true professional machine might be needed. Flat fell seams on Sunbrella can be pretty thick and a problem for many machines. A true pro machine generally has a separate oil tray and a motor completely separate from the machine. They weight a LOT, but they see much heavier fabrics than any domestic machine. I see them around here for $200-300 used.

Pam

RugosaB

You did not ask for this info, but I'm going to offer it anyway:

In the '80's my Singer died and I bought a Viking 630 from a dealer. Never had problems with it. It is still my main machine.

A few years ago I had a brain injury, one of the long lasting results is I just can't seem to learn new mechanical things. (this Viking is mechanical and I learned the one that schools used when schools used such tings.)

So I bought a some Viking 630s (and one 620 and 610) on ebay, just to have parts in case mine dies. Well, it has not, and the ones I got all work fine!
I paid $50-$75 each for them.

It free motions just fine with just a regular presser foot and just this week is going through 6 layers of denim, no problems at all.

They all came with t\the presser feet that came with it originally, and one even came with a walking foot. I have no doubts that it could do the job that you want it for.

It does not need oil, and is old enough to be still made in Sweden. I clean it myself with a small brush and a small shop vac.

RugosaB

Guess I should read the responses more carefully!

sewbizgirl

I agree that for that price you could get two or more of the really good vintage Singers from the 50's that do EVERYTHING and will last several lifetimes.

Mariposa

I'd say get a good vintage machine with all metal gears. You can also service these yourself.
I have a Singer 301A, and it sews through several layers of denim with ease. Also heavy canvas. The vintage machines are also usually a decent price. Shop around, and test drive them if you can.

SusanSusan33

After reading these reviews it reminds me of whatr Mama always said "If it seems too good to be true, it probably is".