That's the low end of the standard price here. You can do it yourself, but you won't get the tax planning you need to keep your taxes as low as they are now.
Tips for do-it-yourselfers:
1) Forms are all at
www.irs.gov2) TurboTax is easier than doing it yourself, and should cost around $35 - $50.
3) You can post it either to the Embassy or to Philadelphia.
4) Don't forget to file Form TD F 90-22.1 if your bank balances ever exceeded $10,000.
5) You can pay for tax planning and still do your own tax return. This is cheaper than paying for both - and far cheaper than paying extra tax in the future due to poor decisions made now. Do it before you prepare your tax return, in case there's an impact you need to keep in mind.
Other tips:
In your particular case, the US/UK tax treaty may affect your situation since there are special residency rules for students. You should take advice before claiming the Foreign Earned Income Exclusion and the Foreign Tax Credit, and before preparing any UK tax returns.