Has Wholesaling slowed down?

[William Huston]

I recently completed Robyn Thompson's bootcamp and i feel very comfortable with determining rehab cost on a property after that course, because i was within 3% of the prices she estimated after we did our estimates in person on multiple properties during the course. 

So i get home and make up the letters and sent out 500 letters to out of state owners of over 7+ years in areas i want to work out of and i've not gotten a single call yet to date. Im starting to question the idea of wholesaling for properties to flip or wholesale.. feel like the market is empty right now...