There are a whole mess of these types operating in Venezuela within country. Go down there often and it is quite the sight to see, let alone be on one. They feel like an old car that is just "loose".

Some of the "better" airlines run old Continental MD-80 aircraft. The only way you could tell is they all have the light blue/dark blue plaid seats. Which I would mention have not had a new cushion since they were last serviced by CO sometimes in the 90's.