As Nigel will tell you, the 84 is obsolete and has been replaced by the 16F628, which has twice the memory, an internal oscillator, and voltage comparators, for a lower price. It's the same physical size and pinout, and anything that runs in an 84 will run on a 628 with a tiny modification that takes seconds to copy and paste. There's no reason not to use a 628. Ever. https://www.mouser.com has 628's for $1.73 for individual units. Talk about cheap indeed. No one will be paying you over that price for the 84's. Unless they're gold plated maybe.
For how much are you ofering them nigel? (as i seean the datasheet they look wery good but the RAM is a litle letdown)
edit:
meaby$1 per chip since these things dont have EEPROM,PWM,ADC...
btw:
did you guys see those IR tags on C bit.I like the idea of them(you pin it on and the tag comunicater whith IR and puts in memory IDs of other tages that has came in the IR range.)
I'll tell you the story! - I was given them, by a guy who took over an industrial unit that had previously been used by a company making satellite decryption cards.
I don't have a programmer capable of programming them (as they are parallel programmed), but I gave one to an old friend with a PICStart+, who confirmed they are blank, and programmed one.
I'm not out to make money from them, it just seems a shame to throw them away - so if anyone wants to come and fetch them, and buy me a beer! - they are welcome!.
If they need posting I would need payment for the cost, and a small amount for the trouble parcelling them up.
They have ICSP,in DIP pakeges and its 28 pin. right? (thats what i got from the datasheet)
i cod use 10 or 20 of them.As for the shiping it dosent need to be fast yust the cheapest posible (the shiping for a cuple of PICs from USA costed just $1.70)as for payment wod it be posible to pay you wen it arives in cash?
meaby for $4 (shod cover the postage and let you about $1-3 for you)
As far as I'm aware they are parallel programmed only?, but MicroChip no longer list the programming specifications, so I can't be sure - however IC-Prog doesn't list it!.