Problem changing Gears ?

I have a stickshift (1993 VW JETTA). I was driving in the 4th gear when I realized that I was not able to get in the 5th gear.

After a while all I could do is get the car in the 3rd or the 4th gear (1st,2nd,5th,reverse all gone). It feels like the gears were never there, the stick is totally free. The reverse is making the car go forward. Any ideas what is wrong ? and how much it might cost ?Problem changing Gears ?
your transmission is rooted, time to get a replacement.Problem changing Gears ?
The shift linkage is worn out. It does not cost much to replace the bushings that are worn out. $50 would be average. The parts are available through VW and pretty much just press into place. Have a nice day
May likely be a shifter mechanism problem. This will not be as expensive to repair as an internal transmission problem. Hopefully something in the shift linkage has come loose. Have this checked by a reputable mechanic and do your homework, do be taken for a ride by unscrupulous mechanics.
your gearbox has alot of gunk in it . If you can take it apart and clean it, it should work fine. If not take it to a specialist.
You linkage is going bad, not allowing you to shift further...
Sounds simple-like perhaps your shift linkage has loosened up and isn't nice and tight. Check out under the hood for what moves when the gearshift lever is manipulated by a helper inside the car. Examine just how the gearshift's 'throw' is attached to the transmission's gear shift mechanism. If the mechanical movement of the gearshift lever isn't effecting gear change, maybe the fastener(s) are loose and allowing 'slop' to interfere with crisp gear selection.
shifter fork problem your stick is not engaging in the shift fork because it is out of place and if the reverse gear is making you car forward either your label is wrong or there is no reverse idler gear so you are missing a gear