cool precision robot Motion CONTROLLER ICs PWM PID filter built-in

Hi,
I have the following motion control hardware PID filter ICs with PWM output, ideal for precision mobile robots (spare huge computing power):
MDIP package:
http://www.national.com/images/pkg/n28b.jpg
Will throw in machined, high quality IC sockets for each IC.
2x LM629N-6 (6 is speed in MHz) 2x LM629N-8
If you design a very SMALL mobile robot, I have a pair of extremely small SOICs (about the size of a 1-cent coin!)
2x LM629M-8
Here is prices at DigiKey: $39 and $24 each IC (they also have a handling fee I believe)
http://www.digikey.com/scripts/DkSearch/dksus.dll?KeywordSearch
These are the best integrated PID filters with PWM output I have ever seen. Elegant design and SIMPLE implementation and programming - see docs below) Perfect for modular mobile robots: get the mobile base with these ICs and cool motor drivers like the LMD18200 and use ANY microcontroller/laptop to control it.
Make an offer - prefer to sell all of them in a single package. Accept Paypal, (incl Visa, MC, Discover, debit cards, etc) Money Orders and maybe checks.
Make an offer I can not resist for all (will consider partial sale if no offer for the whole package is received). THIS IS YOUR CHANCE TO GET SOME WONDERFUL ROBOT PARTS AT A COOL (i.e. YOUR) PRICE. JUST LET ME KNOW.
Data and application sheets:
http://www.national.com/an/AN/AN-706.pdf http://www.national.com/an/AN/AN-693.pdf http://www.national.com/an/AN/AN-868.pdf http://www.national.com/an/AN/AN-694.pdf (I do have 4 of the the LMD18200 motor drivers used in application above).
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