How closely do dealers monitor these boards for the areas of interest of collectors, for future sale
Being on these boards for a while, I have come to know what many of the collectors here collect. For example, if I had a capped bust half dime for sale, I would send a PM or an email to Barndog. If I had an excessively rare MS69 Virginia Statehood quarter, I would sell that exceedingly desirable modern trinket to Cladking. Back in the heyday, if I had a dirty gold coin that did not meet Longacre's discriminating standards, I would pawn it off on RYK. 
From a dealer's point of view, I am sure they know who here collects what. Even dealers who do not participate on these boards, but monitor them, should know what we collect.
When a dealer has a particular coin in stock that he might think a collector here would want, how likely would he be to drop them a PM or an email to let them know of the coin? If I knew that someone collected a particular date coin and I had one available, personally I would type an email in a frenzy to that collector to let him know of it.
Does anyone have any comments or is this not a common practice by the dealers?

From a dealer's point of view, I am sure they know who here collects what. Even dealers who do not participate on these boards, but monitor them, should know what we collect.
When a dealer has a particular coin in stock that he might think a collector here would want, how likely would he be to drop them a PM or an email to let them know of the coin? If I knew that someone collected a particular date coin and I had one available, personally I would type an email in a frenzy to that collector to let him know of it.
Does anyone have any comments or is this not a common practice by the dealers?
Always took candy from strangers
Didn't wanna get me no trade
Never want to be like papa
Working for the boss every night and day
--"Happy", by the Rolling Stones (1972)
Didn't wanna get me no trade
Never want to be like papa
Working for the boss every night and day
--"Happy", by the Rolling Stones (1972)
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Comments
That said, I would never refuse looking at a classic head half eagle if someone offered it.
Recipient of the coveted "You Suck" award, April 2009 for cherrypicking a 1833 CBHD LM-5, and April 2022 for a 1835 LM-12, and again in Aug 2012 for picking off a 1952 FS-902.
Perhaps, due to his extreme prominence and excessive prolificness (yes, that's a word, I just checked), the OP may be in a greater number of Circles of Trust, thereby subjecting him to more offers of widgets by wannabes. (That's a mouthful of forumspeak for one sentence
Personally I'm waiting for the dealers that know I'm collecting the Mercs in rattler holders to give me a call.
Millertime
Complete Dime Set