Thank you for that feedback. Maybe people are put off at the high price I've suggested.
If you are receptive for some friendly advice, then consider the following and if you find such advice unwelcome, then just ignore it and think of it as if it never happened:
A) There are many members with broken or missing drawers. However, that does not mean that every one of them will pay "any" price to replace them. Some folks paid a lot of money for their boombox, but not everyone did. If they paid $50, $100, $250 for their entire boombox, they probably will find $100 for an aftermarket tray, that is a cosmetic issue, simply too steep for their liking. IF they paid $1000 for their boombox and they value it for it's originality, they probably would prefer to find an original instead.
B) Replacement trays come up for sale occasionally, and I don't know if there is a average price, but $70 - $100 seems about right. One came up recently for... $100 and it sold for a "best offer" which means the actual sale price was under $100. It was an original product that came complete with spring and side guide pieces and the mounting screws. If an "original" sold for under $100 complete, and it wasn't like it was gone in minutes having sold through best offer, I think it fair to say that an aftermarket one might be valued at a little bit lower than a complete original. You simply must keep in mind that the current valuation is based on only 1 coming up for sale every now and then. If they were available every day of the week, the price and demand will plummet. If you are spitting them out of your machine on demand, you simply aren't going to be able to compete at a price point where people expect to only see one every now and then.
C) If you offer them for $30, you might make a couple dollars on each one and you'll spend all day making them trying to keep up with demand. But you aren't going to get rich like this, just get really busy, because you aren't going to sell thousands of them at that price, there simply aren't that many C100 boomboxes missing decks with owners desperate or caring enough to want to replace that tray. Remember the boombox will work fine without that tray and over time, you sort of get used to it and don't even see the missing part anymore. But I could see you selling 20 of them real quick, maybe 50 of them in the first year and maybe a total of 200 of them over a 5 year period. On the other hand, if you offer them for $50, you will probably, over the course of 5 years, sell 100~125 of them. Now, if you have visions of dollar signs from $100+ pricing, you might sell 2. Or 3, within the first month or two. Then over the course of 5 years, you might sell 15 of them, maybe a bit more. My advice, try to keep them at around $50 or less. That's about fair, and low enough not to discourage people from buying it and yet high enough to put a few bucks into your pocket and pay off that machine over time. Or you can try and sell for $100+, but I suspect only the most desperate of C100 owners will want to spring for it. Or someone has a nice one and wants to sell their boombox for top dollar, in which case, they might be willing to fork it over because it helps them get top dollar for their boombox. You'll still sell a couple now and then but the sweet spot will be around 1/2 that. You'll make more money that way. In any event, I can't see you selling 200 of them at $100 each.
Now, I'm no fortune teller, but I've made stuff and sold stuff, to these same crowd, and I'm just telling you what I believe through experience. And while I believe what I say, still I could be right but also could be wrong. And the numbers I'm quoting... that includes marketing here, and through an alternate avenue such as on a website, or on eBay. If selling on eBay, be prepared to write off 15% of sales revenue for the cost of doing business. This includes fees and the inevitable ocassional rip off.