You would probably be better off trying to sell everything as a full lot if she is in desperate sincerely (and quickly?) needs the money. Sales here (and other places) can be slow, as others have mentioned. Easiest way to sell and sell fast = list full collection in bulk somewhere FS.
if the collection has more valuable cards like vintage stars, rookies, autos etc, maybe start with some of the more valuable ones and list individually here or otherwise as FS/FT and if anyone sends you a trade request just reply FS only (and note it in your profile)
Greg Maddux, Ronald Acuna Jr., Jacob DeGrom, Max Meyer, Noble Meyer, Kemp Alderman, Spencer Steer, Cole Caufield, Cale Makar, Josh Norris, Pokemon, A&G mini sets, oddball and art cards
Almost everything in my main collection is FT/FS even if it is not listed in my traders!