My recent trip to Kay Jewelers was to let my 6 year old son pick up a Mother's Day sale item for his mother. This has become a tradition for my son to pick up a ring for under $40 for his mother on various holidays (Valentine's, Mother's Day, etc.). My son enjoys going to the store and having the clerk show him the ring, and the clerks are always more than happy to handle even this small sale. I have never found them to be short on stock of their sale items and from the time I enter the store to completing checkout rarely takes longer than 10 minutes. Friendly sales people and a wide stock for any budget. Check 'em out!
PROS: Available stock, friendly 'no-pressure' sales people