Most common calculators in the forum?

[Accutron]

HP-10B
HP-10BII
HP-12C x2 (one single-chip Nut, one ARM)
HP-18C x2 (both of them have perfect battery hatches!)
HP-41C (1933A with all of the bugs)
HP-45 (German instruction label and adapter, 100% brand new condition)
HP-48G
HP-48GX
HP-49G
HP-97 (first year with the small sin bug)
HP 9820A (first year 9810A converted into a first year 9820A, internal use unit from HP Loveland)
HP 9825A (first year production)
HP 9825B (doesn't work, but it's a 9825 so I'm still counting it)
HP Prime

FX-115D
FX-6300G
OH-7000G
FX-7700G
CFX-9800G

SR-10
TI-1270
TI-30 (first version)
SR-40 (first version)
TI-51-II
TI-55
Business Analyst (first version)
Programmable 57
Programmable 58
TI-81
TI-82
TI-85
TI-89

Jeppesen TechStar
Radio Shack EC-281
Radio Shack EC-450 (rebranded Bowmar MX100)
Rockwell 350
Royal 91S

I excluded handheld computers, four bangers, mechanical calculators, slide rules, abacuses and inventory items. The only calculator I keep in my desk drawer is a K&E 4083-3, and my EDC is an early model Pickett N600-ES with a CIF scale. I have several HP emulators installed on my computer, but Emu48 definitely gets used the most.

You should probably lump the SR-40 in with the original TI-30, as they are exactly identical except for the location of the key labels (on keys vs. on bezel.) They were even introduced on the same day. TI apparently felt that double-shot keys justified a doubling of the initial list price, from $25 for the TI-30 to $50 for the SR-40.