When I'm at a thrift store I always look for blank audio cassettes that are still sealed in the package. Even if what I find isn't the hottest type, I still grab them to sell in a lot if the price is low enough.
Last July I was at a church rummage sale and found this box of sealed cassette tapes for .10 each for this box of 9. I listed my 90-cent investment at fixed price for $69.99 and they sold in a few days!
There are a lot of different cassette tapes. Honestly, I know very little about the types but I will share what information I have found.
Some of the brands to look for are:
After the brand name, you'll find the letters that tell you the type of tape:
- MA - Metal Alloy considered the best by many users
- AR - Acoustic Response
- D- Dynamic
- DX - ?
- HD - High Density
- SF- Super Fidelity
- Type I - Normal Bias
- Type II - Chrome High Bias
- Type IV - Metal
- Type III is obsolete
I've heard that the best tapes are the IV or metal tapes. However, it really depends on the needs of the user and the equipment that they are using for recordings.
Some tapes do very well like the TDK MA series where you can get up to $100 for a single cassette. Others types like the TDK D60 don't go for very much even in large lots.
Your best bet is too review the eBay completed items to see what is selling or use your smart phone to check out what you've found.
Lastly don't walk past that table of electronic at the flea markets. The Sony Walkman cassette players from the 1980s can sell upward of $150. I had this Sony Walkman when I was a teenage. If you read the description it sold for $79.95 and doesn't even power on!
So get your 80's groove on and look for those cassette tapes and players!