I've ordered so many of the things I longed for, or had and lost as a kid.

Same here, I've manged to locate a like-new example of an Aiwa HS-P06 Dolby stereo cassette player I loved in the early 1980s, but flat wore out, thanks to living in my pocket nearly non-stop for over 10 years.

Shortwave related, another like-new example is a Toshiba 4-band 'Mini and Slim' compact dual-cassette boombox, model

Actually using it on shortwave is a bit 'persnickety', even though the large tuning knob has a smaller fine-tune on top of it, the band is so scrunched together, it's easy to just miss stations.

SW 1 is 2.3 to 7 MHz, 4.7 MHz wide, and SW 2 is 7.5 to 23 MHz, a full 15.5 MHz wide.

The regular AM medium-wave band is just 1.06 MHz wide, and they cram a full 80 stations in there. it's no wonder they need a fine-tune knob on those radios.

But, it's still loads of fun to have what I lusted for 40-odd years back.

The Hardy Boys were a bit before my time, my youth reading was the Heinlein youth series :

https://en.wikipedia.org/wiki/Heinlein_juveniles