Reputable horse seller/buyer agents in MD, VA, PA area?

[G_G]

Does anyone have recommendations for a horse seller agent and/or a horse buyer agent in the Maryland, Virginia, and Pennsylvania area? Looking to sell my 8 y/o TB mare (jumper/eventer) and purchase new horse. Suggestions for agents that are honest, reliable, trustworthy, and have a successful track record would be much appreciated. Would be great to hear any negative experiences with agents (via DM–no need to disparage in public forum, unless you want). Thanks.

[Highflyer]

Courtney Cooper in Nottingham PA.

[WNT]

Diane Crump in VA.

[kcrubin]

Carrie Butler at Covey Run Eventing

[Virginia_Horse_Mom]

Phyllis Dawson, VA