Is this a good time frame to call back a seller?

[John Baker]

I'm new to BP and real estate investing. I have too many phone calls coming in (about 25 in the last 3 hours). I am too tired to call back the other 13 callers (I've been talking and marketing for 10 hours). Some of them called me at 3:00 and it is now 7:20 (I guess I should have got to them first), so should I call now or get back to them first thing in the morning? Do you think I could lose my potential motivated sellers?