Diana Waschenbach-Gronewold

Diana Waschenbach-Gronewold is a real estate agent with Zanger & Associates, Inc., REALTORS in Quincy. MLS records credit Diana with 32 transactions over the last 12 months, worth $7.8 million in total sales volume. Across both sides of the deal, that is an average of $243,082 per transaction.

26 of those transactions were on the listing side, representing sellers, for $6.4 million. The other 6 were on the selling side, representing buyers, for $1.4 million. Most of the work, 81 percent, is on the listing side, so Diana is more often the agent a seller hires.

The average price differs by side: $245,929 for listings and $230,746 for buyer-side sales.

By sales volume, Diana ranks 3rd of the 66 agents in Quincy with recorded sales, ahead of 95 percent of them. The typical agent there closed 3 transactions worth $836,275, so Diana's volume is about 9.3 times the local median.

Statewide, Diana is 2434th by volume among 25,248 Illinois agents with recorded sales.

In ZIP code 62301, the address on Diana's MLS record, the median sold price was $155,250 across 40 sales between September 2026 and October 2026. Diana's average transaction of $243,082 is about 1.6 times that median, which points to higher-priced homes than the ZIP code as a whole.

Diana is listed with Zanger & Associates, Inc., REALTORS, Quincy. Other agents on the same office record, busiest first:

• Mary Bockenfeld24 transactions · 9.1M volume
• Bridgett Zanger27 transactions · 5.4M volume
• Greg Zanger20 transactions · 4.1M volume
• John Beck15 transactions · 3.5M volume
• Daniel Dolbeare13 transactions · 2.5M volume
• Deanna Zanger3 transactions · 1.1M volume

These other Quincy 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.

• Greg Zanger57 transactions · 13.2M volume
• Carol Shaffer43 transactions · 6.9M volume
• Carol Rischar32 transactions · 6M volume
• Carol Shaffer35 transactions · 4.6M 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. Diana has not claimed this profile, and a listing here does not mean Diana or Zanger & Associates, Inc., REALTORS endorses or is affiliated with Expert Agents Near Me. We collect no reviews, so there are no ratings from us on this page.