The Rolleiflex production fell of dramatically in the late 60s as news photographers all went to 35mm as well as wedding photographers. Studio photographers using 120 would generally use hasselblad. There was still some production though. If you see the serial number that starts with 295...... it is from the mid to late 70s even to the very early 1980s. At that point Rollei started making a lot of collector cameras and especially expensive cameras... the Platin and the Aurum and GXs commemorating years as well as GXs intended for use. In the early 2000s or maybe very late 1990s they started making the FX very expensive but intended for the most part to be used. The Asian market became the top market for Rolleis and is to this day with the new FX-N, FT and FW which are all still available new. I am not sure if the recently introduced FX-N means that the previous FX is ended. Certainly the new FX is still available from dealers.
Originally Posted by Helinophoto
If you want to buy a Rollei and you don't care about a removable finder and using a prism then condition is the issue more than model. The lenses remain the same until the HFT coating on the Platin and the GX/FX. The meter is drastically improved starting with the GX but it is electronic and needs a battery. Otherwise the older F every bit the camera and arguably more than the FX since the FX has no self timer and no locking pc connector.
So if all you care about is the single coated lens and waist level finder then you might as well save yourself some money and get an E or even older. Condition is everything in that regard.