Lowes has the General Stainless Caliper on Clearance for $4.06, plenty in stock in my area but YMMV as always.
List Price: $39.98, on clearance for $4.06
https://www.lowes.com/pd/General-Tools-Instruments-6-in-Digital-Caliper/50175967
https://brickseek.com/lowes-inventory-checker?sku=50175967
- Heavy-duty, stainless-steel construction
- Convenient auto-off feature
- 3-mode digital display: decimal inches, fractional, and metric
- Inside, outside, depth, and step measurements
- Accuracy: +/- 0.001-in +/- 0.02mm
- Resolution: 0.0005-in, 0.01mm, 1/64-in
- Power source: 1 SR44 battery (included)
- Comes with a foam padded case for safe storage when not in use