The HL Product History lists all the retail prices. The latest printed version I have ends with the Clark's Point piece but it seems that this info is now listed somewhere on the HL site?

The Society redemption pieces have a retail value but I'd also go with the membership price for the "freebie" lighthouse. Back a while ago when the single year membership price was $30 I do recall reading in the HL ads something about the "retail value" of the smaller lighthouse. Since I've been collecting it seems to have risen from $30 to $60. $60 is kind of high, imo for the smaller pieces. But then this year's piece is much larger.

I'd still not value these pieces any more than $30 or so, especially since they've had some pretty high edition numbers, i.e. 26,748 for the Baltimore piece in '99, yikes! Edition sizes for '00 & '01 were less, but still 20,000 in '01.