Hey guys! Just a price update, now that I got the PCB quote back. First, the parts list and prices from Digikey..
[IC1] MAX233 MAX233CPP-ND (50x4.32)
[SW1 DPDT Switch CKN5003-ND (25x6.168)
[DB1] DB-9 Header A2096-ND (25x2.4388)
[J1] 10-pin Header A26267-ND $0.44
[J2] Power Jack CP-102A-ND (10x0.33)
[VR1] +5V Reg. 296-13996-5-ND (25x0.39)
[D1] 1N4001 Diode 1N4001GCT-ND (10x0.22)
[C1] 1uf Cap. P993-ND (10x0.14)
[C2] .1uf Cap. P984-ND (10x0.14)
[C3] .33uf Cap. P988-ND (10x0.14)

PCB price is, based on an order of 50, $12 per board. Prices for parts & PCB, above, again based on 50qty, is roughly $25.00.
This does not include shipping, nor my timely fee for assembling it for you.. (No worry. I'm cheap.)

Right now I have 32 orders. I/m guessing I'll have 50 by the time I actually have to order parts, so I'm not worried. Plan on that being the final amount (again. + shipping).

Thanks!
Me.