Difficult to say without seeing all sides of the sealed INTV (assume is INTV II and not Sears) box and am also assuming all games are CIB and in decent used condition, but off the top of my head:
- INTV II sealed with clean box = @$150-200+
- used River Raid with mild wear = @ $40
- 5 used, slightly uncommon games = @ $10-15 each, $13 x 5 = $65
- 43 used common games = @ $3-10 each, $7 x 43 = $301
Would think somewhere in the realm of $550-600 a reasonable estimate but that's just me. Good luck!