Need advice. Is $300 a good deal for a 41CV with manuals and 2 expansion cartridges?

[Jase]

Hi, the original owner is offering for $300.

HP 41CV, with case and two manuals ("HP-41CV Owner's Manual - Basic Operation" and "HP-41CV Operation in Detail")
The price also includes:
"HP-41 Advantage" cartridge and manual.
"Stress Analysis Pac" cartridge and manual.

The calculator was used (wasn't just put in a closet) but it looks to be well taken care of.

Is this a respectable price?
Any potential "gotchas" I should be on the look out for?

Thanks for any help given.
Jase.