My 2 cents.
Where ever you buy it make sure you can bring it back. Like maybe Walmart. I have used Brauns for quite some time. I have my son using Brauns.
As a X-mas present my wife baught me the top of the line Braun. It could not cut my face. Each shave is different. The hole size of the foil was to small and would not allow the hairs to enter the foil so they could be cut 9 and I'm not a big burly guy, I'm blond. Hell I was a sophomore in collage befor I could grow a mustache). We got my son a $30 braun at Walmart and I tried it when he was home for a weekend. it cut my beard in 1/3rd of the time. It was model 3615. I called Braun and they traded me my expensive unit for this unit and 3 foil replacements. Not exactly a even swap. But I was very happy. I couldn't bring back the unit I had and I got what I wanted and 3 foils.
So try buying it a t a store you can return it if your not happy. I have found the cheaper brauns to cut my face the best.
I also found the rotory units would leave my skin red.
As I said each persons face is different. My father in law uses a Norelco. I can't. I also can't use a blade. It really cuts my face up.

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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car