...Have a Ross/TJMaxx/Marshall's close to you? Go there. For $180, you will find the same suits in department stores (Calvin Klein/Claiborne/Perry Ellis/Tasso Elba/Alfani, etc.)...
...Ties: Don't be a sucker and buy them in department stores. Again, Ross/TJMaxx/Marshalls has ties all day long for $8-15 tops. Same with belts....
...FIND THE BEST TAILOR YOU CAN....
...with good tailoring, a $200 suit can look (but never feel to another person) just as good as a $2000...
This is good advice and has always worked pretty well for me
Marshalls (in a nice part of town) or esuit.com are the cheapest suits that are ok quality IMO. Marshalls will have a couple good suits mixed in with a lot of ugly ones, so you have to know what to look for (100% wool, no crazy patterns, etc). Some people just have a natural understanding for art/fashion, and some really don't. Start with basics. You can always wear a green Zenga double breasted suit or a white Armani tux later once you are done with school and have $, but it's a waste until you have money to burn and more importantly, until you know how to shop for good looking suits and outfits. As was said, the big key is just knowing your exact sizes (jacket, shirt neck/sleeve, waist, length). That knowledge will let you buy some off the rack sale stuff, but you have to realize what a tailor can/cannot do for the rack clothes you buy.
First things first, go to a
quality tailor or tux shop and
get measured. It should cost about $10. Next, go buy the classic book
"Dressing the Man" by Flusser (~$35). Finally, go shopping, and buy a basic charcoal or dark navy suit that will work for everything from weddings to interviews to a nice date (no pinstripes, checks, etc on this first suit... you're try to look like a congressman, not Diddy lol).
Keep in mind that dressing good is going to cost way more than you think; it doesn't just mean buy a suit or shirt+tie and you are done. A lot of young guys buy a nice suit or shirt+tie but then proceed to wear them with their regular old leather shoes, belt, etc and look like a slob. There are a lot of subtle fashion rules (read the book) and accessories that must all be considered for a suit to be good overall outfit (dress shirt, tie, socks, shoes, watch, cufflinks, case/bag, etc etc). A pretty nice shirt/polo with jeans/khakis that you wore in undergrad cost you
maybe $100 and you could wear that with whatever accessories you wanted to. Now, compare that to an entry level business outfit... you have 3-10x the cost per outfit now.