I have 3 sets of ramps, 1st set was a christmas gift, very heavy duty, can remove the ramp part and have vehicle on stands, can hold a 3/4 ton truck easily. 2nd set is a poly (plastic) set like in the o.p., I got it for the hhr, it gets it up enough to change oil or other things like a starter replacement ( but if it wont start, how do ya get it up on ramps?) Back when I bought the poly ones the hhr still had that front bumper valance that wasnt far from the ground and most ramps wouldnt work. My 3rd set is a heavily built homemade set (not made by me) they were at a garage sale for $10 and I just couldnt let them be. I use them with the escape mostly. Since the hhr bumper got “modified” after a unplanned off-highway incident, you could use any ramps on it.
Every flea market and most yard sales Ive been to this summer has had a set of those stamped steel ramps, $10-$20 a pair average price. I folded one once, drove up on it (with the green’93 ranger), hit the brakes and it folded/collapsed. I wouldn’t get those. Ideally Id have a lift, realistically I doubt it will ever happen.