nicole mentioned the flower shop but i agree totally and with the idea of blank cards.  all of my local cards are blank.  here is a link to my blog, scroll down and you will see my card stand.  
http://dbvisualarts.blogspot.com/search?updated-max=2008-11-01T01%3A21%3A00-04%3 A00&max-results=7
found it at a thrift store for 50.00 but it is a massive piece of furniture and worth many times more.  otherwise the owners and i find things that are appropriate.  some are in a basket, some are in a tiered plate stand, i even have my postcards in an old skittle board ( a game from the fifties)  they are separated out in designs in a pot lid rack from walmart.
 
since my postcards are my best sellers i am considering a real postcard rack, i found one that will has 63 pockets and stands about 6 ft tall.  i would ask the owner what they preferred.  my guys have an antique store so we try to use found objects as much as possible like baskets and boxes.  you just have to be sure they can be seen without having to rummage through them, shop wear means lost income

Hi there,
 
I think anything under $4.50 is fair and competitive for a paper card. Most cards I see in stores are $2.99 and up, lots in the $3 and $4 range.

Hi, I live in NZ, so the currency will be different - http://www.xe.com will give you the exchange rate.
 
We sell our existing (non-gcu) printed cards for $3.00+gst and the stores sell them for $6.00  (they cost us $1.50)
 
I find stores expect this mark-up here in NZ
 
OOPS _ JUST REALISED i HAD ALREADY POSTED - SORRY - ALWAYS REPEATING MYSELF...!!!

Bruce, I can't speak for anyone but myself - I think you'll be hearing that some have very good experience in this area - but I will comment that there's something to be said for the immediacy of spotting a card in a shop (or at a fair, or wherever it's being displayed) that justifies a higher price. The lowest price, strictly speaking, isn't the strongest drawing point in all cases, I have found. Much as people enjoy and are used to ordering online these days, many still appreciate seeing the actual product in front of them and are happy to have it immediately after purchasing. Customers expect that sort of convenience to be reflected in the price, much like the difference between, let's say, buying take-away food or groceries and eating in an establishment (as an argument for the stores to whom you are selling). It's a choice that can go in both directions; one doesn't necessarily cancel out the other, because they are often two different markets. Also, it's possible to arrange things in such a way that a store wouldn't be risking too much on a large inventory but rather keeping supply and demand fairly close to each other.

Bruce, I'm speaking as a business woman in California only, you don't mention where you live so they guidelines may be different in different states.
 
In California if you wish to sell yourself, yes you must have a Seller's Permit aka Resale License, look those terms up through the Government sites and apply for one from there.  So, if you sell wholesale to another store who is going to sell them retail, then you DO NOT collect tax from the store AND you should not have to pay sales tax when purchasing them for resale from GCU.
 
IF you are going to sell at a fair or on your own, YES you have to collect sales tax from the customer.
 
Go do some research for yourself to be sure you know what you are getting into in your state.
 
Doreen

Bruce, your accountant friend will be a big help to you...glad to hear you have that resource.  Wholesale is about pricing not quantity.  Again, in California, the average wholesale price is 50% below the retail price.  So for example, if the store would sell your card for $3.50, you would probably have to sell it to the store for $1.75 to $2.25 depending on the store, so you may have to buy your cards bulk in order to gain much profit.  
 
That's a starting point for you, again in NY you should go to small stores that carry cards and price them, they may sell for $5.00 or more on the east coast in which case you could do well.
 
Good Luck
Doreen