It is going to take some searching, due to a tight budget.
The Boston/Sherwood deal posted above is good.
Also look at some Ebay options.
DCM CX17, I prefer them over the older Paradigm Titans
DCM CX-17 BOOKSHELF/ STAND MOUNT SPEAKERS GOOD CONDITION WORK GREAT! | eBay
Rockford Fostage FA61.0 passive monitor - based on the
old Hafler active monitors. They are decent
Rockford Fosgate FA61.0 Speaker | eBay
JBL did decent on the HLS series, The HLS 810
Pair of (2) JBL Model HLS810 2-Way Bookshelf Main/Stereo Speakers Black | eBay
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Not for me, however they may rock your boat -
Dayton sub
Dayton Audio SUB-1200 12" 120 Watt Powered Subwoofer 300-629
BIC F12 sub
Amazon.com: BIC America F12 12-Inch 475-Watt Front Firing Powered Subwoofer: Electronics
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This receiver has a sub out
DENON AVR-1312 5.1 Channel A/V Home Theater Receiver | Accessories4less
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Other options
This is an ugly duck that sounds good, the second woofer
is behind the tweeter. Free shipping - DCM CX-27
2 Vintage DCM CX-27 2 Way Main Stereo Speaker System 150 Watt 6 Ohm 6.5" Woofer | eBay
The Infinity Crescendo 3006 is a nice speaker - a big bookshelf
Infinity Crescendo 3006 in excellent condition | eBay