Please, please buy the model with swinging back.
You can either shoot Polaroid, 6x9 sheet film, or 120 roll film in 6x6, 6x7 and 6x9 formats. Maybe there is a 4.5x6 option too, but I'm not sure.
I have the old silver "Super 23", with plenty of accessories, some black lenses from Universal and Polaroid times, a number of backs, and even 6x9 sheet film holders (plus some B&W sheet film, and loads of 120 rolls).
Especially for still life, a movable back opens a whole new world of possibilities...
If you don't find one, or need some particular accessory, feel free to PM me.
The Universal model in the picture had a fixed back, but was equipped with extraordinary wide angles.
The rest of the black lenses are more or less equivalent to the old silver ones, but the old wides are inferior to the newer (black) optics.
cheers
Paolo