dual inline TDS meter question

Hey I just checked www.buckeyefieldsupply.com and that same exact dual inline TDS meter is $8 cheaper there ($27) than what thefilterguys.com charge ($35).
http://www.buckeyefieldsupply.com/showproducts.asp?Category=208&Sub=149
I'll be ordering this one with some new charcoal and sediment filters in the next week or so.

 

All in all I think BC got a good deal, got all the meters and advice.

 

Well, I got in my box of RODI goodies from BuckeyeFieldSupply and just got done hooking up the dual inline HM Digtial TDS meter to my old RODI.
The LFS guy was right about one thing so far: Waterbury has great tap water.
I'm reading just 33 ppm TDS coming out of the tap, 0 ppm out of the RO membrane, and 0 ppm out of the DI canister.
I could barely believe 0 ppm out of the RO membrane (it was actually 3-4 ppm when I first turned it on, then it went to zero seconds later. After that, I relocated it to read the tap water and was surprised at only 33 ppm, since a lot you all have much higer levels than that. I'm guessing these filter supplies ought to last quite a long time with tap water this good.