I typically pick up 200+ a month, sometimes I find major caches ($250+... Biggest was $1200) that I will clear out, search and dump in a hurry. I typically keep anything MS63 or better, any T1 Bicentennials, '71-D FEV's, '72 T2's, and silver/proofs. I think I've probably searched through somewhere around $5k-$6k in dollars and pulled the following;
3 '71-D FEV's... All found together earlier this week actually, took me long enough to find one... Then to find 3 at once?

10 '72 T2's... A couple were together, most have been the lone keeper in a lot of $50-$100 worth. 3 are MS, the rest are XF-AU.
3 Morgans... All at the same time, along with a '72 T2 out of $5 a teller had... the other coin was a common '76 T2.
1 Peace... Mixed in with $120 in junk Ikes.
1 Silver Ike.... Mixed in with $80 in junk Ikes.
Tellers are usually thrilled to get rid of them. To answer the OP's question, I've been finding less lately, actually.