Blue relief ignition modules - Standard Motor Products

Inexpensive... [with free shipping]

https://www.ebay.com/itm/113909780862?fits=Engine+-+Liter_Display%3A7.5L%7CMake%3AFord&epid=218156544&hash=item1a858d517e:g:INAAAOSwU0xghuqI

Wow that's half what I paid (I didn't need one but bought a spare defensively in case the part got hard to get). Think they're legit?