[[XST]O_x]

pawn Код:

public OnPlayerRequestSpawn(playerid)
{
    new s = GetPlayerSkin(playerid);
    switch (s) {
        case 270,296,30,292, 181, 294: if(GetPlayerScore(playerid) < 200) return SendClientMessage(playerid, -1, "ERROR: You need 200 score!");
    }
    return 1;
}

Or, even better:

pawn Код:

new allowedSkinScores[6][2] = {
{270, 200},
{296, 200},
{30, 200},
{292, 200},
{181, 200},
{294, 200}};

public OnPlayerRequestSpawn(playerid)
{
    for(new i = 0; i < sizeof allowedSkinScores; i++) {
        if( (GetPlayerSkin(playerid) == allowedSkinScores[i][0]) && (GetPlayerScore(playerid) < allowedSkinScores[i][1])) return SendClientMessage(playerid, -1, "ERROR: You need 200 score!");
    }
    return 1;
}

Just add skin ID's to the array if you want more skins. And you can change 200 to any other score you want.