If you can't get them in you can't sell the listing

No curb appeal = fewer buyers.
Fewer buyers= longer hoding periods.
Longer holding periods = more seller holding expenses
More seller holding expenses = less profit.
Less curb appeal = lower listing price to entice buyers to look inside or inside photos in advertising to the public that will tell the buyer its worth looing inside.

So if you want lower selling expenses and have no curb appeal the lower the price the faster the sale. The faster te sale the lower the caring costs that cut into your profit. Over priced listing shave higher advertising and caring costs and result in slower sales or no sale at all.