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

[Didier Lachieze]

Battery contacts corrosion due to battery leakage is a frequent issue on HP-41s and is something to check (see the attached picture showing such corrosion on the battery contacts). For $300 I would expect pristine contacts and would not buy a unit showing some corrosion, this is repairable but would add cost and opening the unit to change the battery contacts increase the risk of adding further damage because the aged case plastic is fragile and screw posts can break easily.