ભાવમાં સાદું, તોલમાં સાદું નહીં.

bhāvamāṁ sāduṁ, tōlamāṁ sāduṁ nahīṁ.

Literally: Simple in price, but not simple in weight.
What it means: Items that appear cheap often turn out to be short in measure.

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1921) · read from the scan by machine — the Gujarati itself is unchecked · English is machine-made and nobody has checked it yet

Heard it differently, or know we've got the sense wrong? Tell us — that is exactly the kind of correction this needs.