Some tracking systems and rough prices:
| Ascension Spacepad | electromagnetic | ISA | $1500 |
| Ascension pciBird | electromagnetic | PCI | $3500 |
| Ascension Flock of Birds | electromagnetic | serial | $5000 - $10000 |
| Intersense Intertrax2 | inertial | USB | $1000 |
| Logitech | ultrasonic | serial | $2800 |
| Origin Instruments DynaSight | optical | serial | $2200 |
| WorldViz PPT | optical | serial | $10000 |