Entry level build as of 2-20-18 just to get an idea of what i would suggest for a friend.

Part List

Frame	Special Edition - Meteor 5" X (11 builds) Spaceonefpv.com	$24.99
Flight Controller	F3 Flight Controller Acro 6 DOF/Deluxe 10 DOF for RC Multirotor FPV Racing Drone (85 builds) Banggood.com	$16.05
ESCs	4X Racerstar RS30A 30A Blheli_S OPTO 2-4S ESC Support Oneshot42 Multishot for RC FPV Racing Drone (9 builds) Banggood.com	$32.00
Motors	4X Racerstar Racing Edition 2205 BR2205 3000KV 2-4S Brushless Motor For X210 X220 250 260 RC Drone FPV Racing Banggood.com	$28.45
Propellers	5" Triple Blade Propeller 5051TCS (Triple Crane Style) (123 builds) Racekraft.com	$3.99
FPV Camera	Foxeer Arrow Micro V2 2.1mm 600TVL 150 Degree 1/3 CCD IR Blocked FPV Camera w/ Upgraded OSD 5.5g (76 builds) Banggood.com	$23.90
FPV Transmitter	TBS Unify Nano 5.8 GHz Video Transmitter Fpvheadquarters.com	$24.95
Receiver	FrSky R-XSR Ultra SBUS/CPPM D16 16CH Mini Redundancy Receiver 1.5g for RC Multirotor FPV Racing Drone (937 builds) Banggood.com	$24.29
Batteries	CNHL G+PLUS 1300mAh 4S 14.8V 100C Lipo Battery Pack (14 builds) Chinahobbyline.com	$21.99
Power Distribution	Realacc / Matek HUBOSD ECO X Type w/STOSD8 Current Sensor 5V 12V Dual BEC PDB with XT60 Plug for RC Drone (25 builds) Banggood.com	$14.99
Misc Parts	iSDT SC-620 500W 20A MINI Smart LCD Battery Balance Charger Banggood.com	$44.99
Misc Parts	Eachine VR006 VR-006 3 Inch 500*300 Display 5.8G 40CH Mini FPV Goggles Build in 3.7V 500mAh Battery (3 builds) Banggood.com	$39.99

Sample Budget Build