Music Shop price suggestions

I mostly play solo. Next wipe, I was planning to try and set up a music shop selling tapes with famous music on them. With the rentable shops coming, I found the idea even better (I was going to try anyway). How much scrap would you guys pay for things like this?

I will put the resource cost for the item right after it.

I was planning on:

30 sec music tapes - 35 scrap(100 metal fragments per tape)

Portable Boom Box - 45 scrap(125 metal fragments per unit)

Boom Box - 50 scrap(200 wood, 100 frags, 20 cloth)

Speakers - 25 scrap(75 metal frags)

Cassete Recorder - 150 scrap(75 metal frags)

I don't know if I should sell the cassette recorder to make it more appealing for people to buy from me. That's why the price is so high. What do you guys think of the price? Too high? Too low? Would you buy it if you were playing?

Also, should I sell more music-related things, maybe? If so, what?