Hello Kaela B.
I received your message. I did purchase two Beogram 5500 turntables, one working and one not. Both came with MMC 3 cartridges. It took me a couple of months of watching Audio Karma, eBay and BeoWorld to buy these two turntables. Unfortunately I don't remember what I paid for them. I will look for the receipts this week and let you know if I find them.
I know the non-working TT was part of a BeoSystem 5500 that someone had not listened to for a long time and they admitted that they didn't know what was working and what was not. Unfortunately, most of the system does not work. But they are identical components to what I have, and I like having the spare parts should I need them. I am guessing I paid about $600-700 for the cassette player, CD player, wireless remote station, hand held remote, receiver and turntable with MMC3 cartridge, including shipping. They sold it piecemeal and I was high bidder on every item in the system.
My current working Beo 5500 system I bought locally at an estate sale for maybe $250. It was working when I bought it, and I am listening to Miles Davis on it as I type this message. That was a great find, and it was only lacking the Beogram 5500 turntable and cartridge.
The working Beogram 5500 that I bought is now part of that system found in the estate sale. It works and sounds fine, and I like the way the system functions together. But, I have other brands of turntables that I actually prefer. The choice of cartridges is much broader with some good values to choose from, and they track much lighter. So, I listen to them most of the time.
I have not heard a MMC 5 cartridge. As I remember there is one source for new ones, and only a few sources for rebuilding the used cartridges.
If you are inclined to get the most you can, and have the time, you might list it on Audio Karma and see if there are any takers. I think most equipment sells for more there than on eBay, but eBay is a much broader market.
If you have some photos of it, and can include some of the stylus and its condition, I would be interested in seeing them. The MMC 5 has my interest if it was an improvement over my MMC 3 cartridges. I am guessing you could ship your TT anywhere in the US for about $100-125. They are not difficult to package, but it is critical that it be done correctly in order to avoid damage. I could give you some tips on packaging, or you could do a search on the subject and probably find something on YouTube
We can continue discussion through BeoWorld, or if you feel comfortable we can share email addresses. I use the same name on eBay, "couldbfishin", so you can look at my buying history and rating there. I have purchased several sets of speakers and stereo equipment there, and I rebuild vacuum tube gear as a hobby. I keep thinking I am going to sell some equipment, but I haven't yet. I also need to downsize, or trade up as I say.
Couldbfishin
Houston, TX