IBM DOS 2.10 (by Microsoft) in original IBM box all disks tested shipped at cost

Description

PLEASE ALL THE WAY DOWN FOR IMPORTANT INFORMATION
IGNORE SHIPPING COSTS. ITEMS SHIPPED AT COST, REFUND ISSUED IF NECESSARY
This listing is for a set of IBM DOS VERSION 2.10 (by Microsoft)  disks with all IBM documentation in original factory box.
These are 360k disks ( a 1.2M drive will *usually* read a 360k disk, but not always. Keep that in mind )
All disks were tested, and you can see them being shown working.
Box is in fair condition. Booklet is in good condition.
Items will be very carefully and safely packaged and shipped.
Check my feedback.
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Test procedures:
I built a Four Floppy computer (360k, 720k, 1.2M and 1.44M ) with CD-ROM drive back in the 90's. I have a special four floppy drive controller in a 486DX4-100 computer that I built for "special purposes". I found out a long time ago that Windows 3.1 would support four floppy drives. (Win95 and above WILL NOT). This allows me to easily "read" disks a lot faster than entering DOS commands. (Plus, I can copy programs from any media, including CD-ROM drives to any size media I want. I could even copy to and from 2.88 drives back when I had PS/2 machines by networking them.) You can see a picture of the computer in the photos.
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All disks are "looked at"
to prevent any disputes
about any disks that can't be read. This is time consuming, but important when selling old software. If I run across any disk that I can't read, I don't list it.
I will show disks being read by Windows 3.1 File Manager if space allows. Naturally, I can't show all disks if there are too many,
but they will ALL BE TESTED.
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I no longer like to  lose money shipping items, so I use the USPS calculator and issue refunds  when necessary ( almost always )