I recently requested a series of 3 books, I tried to get all the books from 1 member, you know to keep costs down, but I ended up ordering from different members. Now one of my requests had no reply/ignored by a member; here's my frustration, the new member that my request went to had all three books-had I known that I would have just ordered them from 1 member. Is there a way to see all the members offering a paticular book so I can compare shelves and make the most economical choice?

no, unless you want to go shelf by shelf.  You could also post in the Bazaar or Genre forum what you are looking for and perhaps someone will respond.

A post in the Bazaar is probably the best way to go about it.  I've used the buyer's remorse period to check, and then cancel different transactions if I find one book comes from a shelf with the others, but even then that wouldn't help in your situation.  It sounds as if the other transactions have already gone through, so there's not much you can do to change the situation.  Ultimately, while it's nice to help potential senders out by ordering all your books from one shelf, if you can't at least it's not costing you anything more.  Still, I feel for the position you're in.  Maybe you could send some feedback suggesting a way to search for multiple books at once to see if anyone happens to have them all?

Since PBS works on the FIFO system, there isn't anything built in to allow you to do this. The concept is that the first person who posted the book gets the request.

There is a way to try to do it though. You request the first book-when you get to the address confirmation page there will be an Order More From Member button. Hit that and check their shelf for the others. If you do not find any you can click your browser's back arrow to back out of the transaction and the request is never submitted. Then do the same with book 2, and on through the series. You will only get to try the members with the books in the first spots but I've had some luck with it. You can also go into the Box of Books section and search the Boxers shelves for someone with more than one on their shelf. Again it won't look at all members' shelves, but it will at least check all the Boxers' shelves.

Sometimes I will look at the people who subscribe to Box o' books.  I'll type in what I am looking for and look at the shelves of the people that have that book and see if they have any of the other books in that series.  :)

It's very nice of you to try to save money for your prospective senders, but it doesn't cost you any more credit-wise to order from separate senders (unless you were planning to ask for a deal). If there's a problem with a sender, it's possible that all the books would be affected (eg not up to posting guidelines, smoke smell, etc). Just playing devil's advocate ...

There is a way to try to do it though. You request the first book-when you get to the address confirmation page there will be an Order More From Member button. Hit that and check their shelf for the others. If you do not find any you can click your browser's back arrow to back out of the transaction and the request is never submitted. Then do the same with book 2, and on through the series. You will only get to try the members with the books in the first spots but I've had some luck with it.

This is what I've done and also had luck with.

What I do when ordering more than 1 from a series-I search boxer shelves.  You don't have to be a boxer to search the boxer shelves.  So I'll see if someone has more than 1 of the books I want.  Or I open 2 PBS windows. I order 1 book on one window and the other book on the 2nd window-then I hit the Order More From Member button.  Frequently one of them will have both books.  Then I just don't complete the other order.

And like someone else said: it doesn't save you any money to just order htem from FIFO.  It's nice to save the sender some postage money. But you would still spend the same amount in credits unless they offered you a deal.

I have also used Shelly's method. Although instead ef starting with the first book, I start with whichever one has the fewest copies - especially if any are singletons, since you'd have to order that copy anyway.