It depends on what kind you are looking for.
Size will greatly impact the price, so determine what you need in your greenhouse (i.e. what is your climate like? will you need to heat it? are you starting seeds in the spring? Are you overwintering tropicals or orchids? etc. etc.)
Depending on these answers, you will spend more or less for a greenhouse. There are lots of different kinds built with a variety of materials, from plastic to aluminum to wood. Also, the exteriors also can be coated in a variety of materials, from plastic cloth to polycarbonate panels to glass. The cheapest, of course is a plastic framed plastic cloth covered small greenhouse. The most expensive would be a wood-framed, glass model.
In my research, for the money, Harbor Frieght Tools has the cheapest, most sturdy greenhouse. You're still going to spend a couple hundred bucks on a greenhouse, but it is a polycarbonate walled, aluminum structure that will likely hold up to many seasons of use. They also come in a variety of sizes.
If you are just getting a jump on the season or starting seeds, may I recommend cold frames instead? Get an old window and build a bottomless box, hinge the window to the top of it and there ya go... about $20. And has all the capabilities of a greenhouse for that purpose without the expense.
Cheers:
Eric
cheapest to buy brand new? cheapest to buy used?to buy used cheapest to own? cheapest to fix? cheapest to drive? cheapest for WHAT?to buy used
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The cheapest panasonic television will depend upon where you buy the television. Prices will differ depending upon where you buy it. The older models are the cheapest.
the cheapest i have seen is 2p
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There is no cheapest but 1 month is £4.95 and you can buy it from sainsburys
The cheapest day to buy consoles is usually Black Friday or Cyber Monday.
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The cheapest day of the year to buy electronics is either Black Friday or Cyber Monday.