Yep lovely camera got the 500el/m with same 80 mm lens - the quality of the image is stunning, absolutely stunning. In addition yours looks in great condition. A few things worth thinking about
backs - with lightseals needing replacing etc -worthwhile as easy to put new ones in - overlapping frames with the back more problematic but if handy the service manual is out there as a pdf The backs can be bought for rather silly money or very little (£25 is the most I've paid) the A16 back tends to go even cheaper and you can make a mask for the screen easily and cheaply (bit of acetate and a pen !) I tend to use this for colour
the ext tube - remember to remove lens /tube in correct order or can cause problems
If it jams - see online plenty of unjamming tutorials and can be done fairly easily (just scarey first time )
The Kiev prism finder fits (can be found unmetered as well as average or average + spot) worth it as useful for some shots (and so cheap ! ) the Hasselblad one is very painful ! (but great!) however makes the camera even heavier
Lenshood -don't underestimate how much the lenses like them (even the multicoated series) if you haven't got one for the 150mm - Chinese replicas can be bought very cheaply
Have fun, great camera and would love the 150mm !!
