These are one-use Wonderous items.
They look like chopsticks. Thick enough not to break by themselves, but easy enough to snap if you want to.
Snapping a Teleport Chopstick will take you to a single, pre-programmed location, selected during the creation of the chopstick.
My characters have taken over an enemy base, where these chopsticks were used all the time to bring back people to the base after a mission. The party only has 8 or so of the sticks left (the ones they found looting the base), and needs to pick up some more while they're in town.
You've got a single use, use-activated teleport spell. Roughly the equivalent of a potion.*
Base cost would be along the lines of: 5 (spell level) x 9 (minimum caster level) x 50 (single use, use-activated) = 2,250 gp.
You are limiting the spell by pre-determining the destination of the teleport spell, which would normally reduce the price, but at the same time you are using Craft Wonderous Item to cheat and bypass the spell level limits of Brew Potion... All in all, I'd leave the base price about where it is -- maybe round it down to 2,000.
Remember, a scroll of teleport costs 1,125 gp. And these "chopsticks" are arguably more useful, since anyone can use them.
*Normally, I'd use the same rules for crafting a potion, and just say that it's an "alternate form" of the equivalent potion... Unfortunately, you can't put a 5th level spell into a potion.
Cyclotron has the right idea, if it's limited to a 900-mile teleport. If not, I'd use word of recall as the spell instead, increasing the price to 3,300 gp (6th level spell - or 1,800 gp with my house rules).
Those prices aren't unreasonable, I suppose.
Personally i'd be more inclined to price them acording to how essential they are rather than by the book.
If they're something that is handy to get characters back to base after a mission because it saves on in game time roleplaying out the three weeks travelling, i'd probably price them low/less than the book as all it does is save time (although i do see where this could be open to some abuse).
If they were used more for something that they could get back to home base to heal up/get out of encounters if they were being masacred and then go back in 'cause the encounter was only an hours ride away, then i'd price it high/as the book.
It all depends how much you/they like random encounters on the way back home between adventures.
I'd cut the price a bit since they lack the utility of a true teleport spell, being preprogrammed and all.
2000 gp would not be game breaking IMO. As a PC, I might even be willing to pay a little more. I'd require the item creator to have been at the location of the teleport target at some point in time.
Now, I might be wrong, but I almost think I remember some spell you could cast to get this same effect. Cast a spell on a stick, and when you break it, you're teleported.
The intent of the item was to have an easy way back to base after an adventure, but I've already established precident for them being used in creative ways in combat, so the more expensive price might be suitable.
It's a cleric spell... used to be called succor, but I keep forgetting the current one.
You're thinking of refuge, 7th level cleric/9th level wizard spell with a material component costing 1,500 gp (but yes, it was called succor in 2e - I'm guessing they didn't want people to cast the "sucker" spell). So buying one should cost at least 2,410 gp. However, a refuge only teleports one person, not the entire party. Most other teleport spells can teleport the caster plus 1 person per three levels.