My quotient is 3 for 1 DC over 3 years.
I've had 9 in total which are:
M&P pram (2nd hand from ebay) - bought while pregnant having know idea about prams. Taken to charity shop after 1st outing with newborn as heavy and hard to steer.
M&P buggy (2nd hand from ebay) - again bought while pregnant and sold to friend who couldn't afford a new buggy.
Graco Mosaic - biggest waste of money ever! Rubbish quality & terrible brakes. Sold at bootfair after noone bought it on ebay.
Bebe Confort Loola - bought to keep lo rearfacing, but was heavy and awkward getting up kerbs. Lo didn't like rearfacing after a while as was too laid back. Sold on ebay for only £20 less than I paid for it.
Maclaren Techno XT - had this for about a year. Lo was uncomfortable by 15 months old as her head was over the seat back. Think I also damaged it in the snow as it never steered straight again! Sold to a shop on ebay.
BJCM - the best buggy ever! I have had it for well over a year and have used it so much it's just about worn out. The handle rubber has split, I've worn the wheels down so much I am starting to see the wheel rim through the rubber and it creaks quite loudly with the weigh of my daughter! But I love it and have walked miles with it and still use it most of the time.
Urban Detour - bought of ebay as BJCM not good for off roading & snow!
Maclaren Quest - 2nd hand of ebay. Didn't like it and resold 2 weeks later for more than I bought it for.
BJ City Elite - my latest purchase. All Terrain big brother to the BJCM. Bought for country walks, snow etc to replace the Urban Detour I'm about to sell.
The most buggies I've had in anyone time is 3, but my Maclaren techno was my only buggy for about 6 months, which was then replaced by the BJCM as my only buggy again for 10 months. Only started looking at offroaders after moving from the City to the country.