It depends on what you want to do with your magic...
^^^ THIS!
It all really depends on what you are going for. I'm into only one handed stuff and I've only purchased 3 items from The Wire (Ace Cut, Mechanics Pass, and Knacky Hacky Sacky). I'm extremely picky and only get stuff that I intend on using for a very long time or see a way to improve upon something.
Whether you have a character, script and have a really good of what you're looking for or just testing the waters. Personally, I have no way to tell how long you've been doing magic or what type of audience you want to perform for and what preferences you have to what magic you have an affinity for. I don't want to recommend card tricks if you're a coin guy.
I'm not sure I can help you except to maybe start with the 'free' stuff on the Wire just to feel around and get an idea of what you're looking for. Heck, download a bunch of the free stuff and write reviews for them while you're at it. Helps everyone out in the community.
I'd like to promote some of the most mind blowing stuff on the site. But I'd hate for you to invest in something (especially something expensive) that you'll use a few times and never use again.