Mary Costello

Mary Costello is a real estate agent with Classic Realty Group in Granbury. MLS records credit Mary with 1 transaction over the last 12 months, worth $435,000 in total sales volume. Across both sides of the deal, that is an average of $435,000 per transaction.

All of Mary's MLS activity in this period is on the listing side, representing sellers: 1 listing transaction for $435,000, or $435,000 on average.

By sales volume, Mary ranks 1071st of the 1,271 agents in Plano with recorded sales, ahead of 16 percent of them. The typical agent there closed 3 transactions worth $1.3 million.

Statewide, Mary is 56199th by volume among 72,302 Texas agents with recorded sales.

In ZIP code 75075, the address on Mary's MLS record, the median sold price was $488,750 across 38 sales between September 2026 and October 2026. Mary's average transaction of $435,000 sits close to that median.

Mary is listed with Classic Realty Group, Granbury. Other agents on the same office record, busiest first:

• Barbara Farner5 transactions · 3.6M volume
• Ken Robinson2 transactions · 1.5M volume

These other Plano agents also have recorded sales in the last 12 months. They are ranked by sales volume. Compare a few before you pick someone to interview.

• Cindy O'Gorman99 transactions · 112M volume
• Sharon Ketko55 transactions · 72.1M volume
• Jan Richey35 transactions · 42.3M volume
• Denton Aguam78 transactions · 39.5M volume
• Terri McCoy62 transactions · 37.1M volume
• Kim Davis48 transactions · 25.9M volume

The numbers on this page come from public MLS and license records, last updated May 2026. Transaction counts and dollar volumes cover the last 12 months and are credited to the agent named on each record. Mary has not claimed this profile, and a listing here does not mean Mary or Classic Realty Group endorses or is affiliated with Expert Agents Near Me. We collect no reviews, so there are no ratings from us on this page.