it cost 2 dollars for inline skates
... It depends Where
Roller blades are much faster and better. The roller skates are not as flexible as roller blades are. It's much safer to wear roller blades than roller skates and roller skates are likely to trip you up than roller blades. Also roller blades have more control than roller skates.
depense on the size
You wont have as much control and It will feel awkward.
They are 78.75
advancement in roller skates has changed dramatically. when roller skates were invented, they were something like this: a wooden plate resting on two sticks attached with wheels. as scince and technology changed, roller skates also strted to develope. around 1980's the new model of roller skates came out. this time it was much stable and quicker than the previous ones. those skates used ball bearings fitted in the wheels. the top was made of metal. these days they are more advanced. they still use ball bearings, metal top but added with a fluid, which allows to gain a quick and fast speed.
how much did a slinky cost in the 1950s
it depends on what skates you want the price mostly ranges at about 90$-300$
It depends on if your going to buy good ones decent ones or bad ones.
Ice skates cost about $99.00 or 100 something dollars.