Are Sparcom card still relevant?

[rprosperi]

That manual is for older, non-Pro version of the EE Pac.

In general the "XX Pac" series of Sparcom's cards were intended for the 48SX machines (e.g. EE Ref. Pac, ME Pac, Physics Pac), while the "XX Pro" cards were for the 48GX models.

For some of the cards, the difference between the non-Pro and Pro versions is not great, while quite different for others.

Also, I have read that some of the earlier cards have problems working in GX machines, but the few that I've dabbled with seemed OK for the small amount I explored.

Generally speaking, these cards are as useful today as in the 90's, though there are of course likely better tools available today.

Most of these today are bought by collectors, rather than as primary use tools by engineers and scientists, The ridiculous prices for these cards on eBay are generally due to excessive greed by a handful of sellers, and most that you see in new listings are simply re-listings of the same few cards over and over again because most sensible people will not pay such exorbitant prices.