Rusty:
Your request really is hard to answer. I have no real idea as to your anticipated needs, where and when you will use the tent, and what qualifies as "inexpensive". To some people $300 is a cheap tent. To others it is outrageously expensive.
As far as tents go you have several issues to reconcile.
Size/portability issues. Big tents are comfortable, but weigh a TON. There is a BIG difference between a 7.5-8 lb lightwieght 3 person and a 16 lb monster. Of course, lighter tents are smaller...
Materials/Construction: This accoutns for much of the cost. Cheap heavy tents have cheap fiberglass poles. Lighter, higher grade tents utilize lighter aluminum poles. Unfortunately, the aluminim poles cost $$$$$$.
Anticipated use: Most tents are three season tents. Four season tents are of a heavier construction, and typically use an additional pole or two (or three) to support a modest snow load. Of course, more poles = more $$$ and more Lbs...
Cost: You can find anything from $50 Walmrt specials to $800 top of the line tents. Take your pick. In my case, I recently looked for a high quality back packing tent. I needed room for three people. Wieght was an issue. I wanted a three season tent. I also anticipated use during the hotter times of the year, so I insisted on decent ventilation. After searching all the decent manufacturers I could find I opted for a Cabelas XPG backpacking tent. Cost $179, supposedly sleeps four (if it's family of dwarves) and weighs 7 lb 12oz.
www.cabelas.comIts moderately priced, of very good construction, is a free standing two pole design, has great ventilation, and is actually light enough to use. It is quite adequate for me (6' 230), wife (5'4" 125) and our kid (now 6). This tent is a real pleasure to use. I like the rectangular, useable florr much more than the usual octagon shape. However, being a two pole design, this tent should not be relied upon as a four season tent. Cabelas makes (or made) a four season variant that sold for $100 more or so. Unfortunately, It was also about double the weight.
Tents are like most other things. They are always about compromises. The idea tent weight 1 lb 4 oz, is as stout as a brick $hithouse, can withstand a class five hurricane, sets up in 30 seconds in a blizzard and cost $18. Unfortunately, it doesn exist. Tents are alwasy about compromises: Rigidity vs weight, ventilation vs weatherpoorfing, etc
Good luck
Frozenny