diff --git a/src/land.c b/src/land.c
index 0be240b..31b257a 100644
--- a/src/land.c
+++ b/src/land.c
@@ -514,6 +514,10 @@ static void shipyard_update(char* str) {
 
   window_modifyText(secondary_wid, "txtDDesc", buf);
 
+  if(ship->price > player->credits)
+    window_disableButton(secondary_wid, "btnBuyShip");
+  else window_enableButton(secondary_wid, "btnBuyShip");
+
 }
 
 static void shipyard_info(char* str) {
@@ -539,6 +543,10 @@ static void shipyard_buy(char* str) {
 
   player_newShip(ship, player->solid->pos.x, player->solid->pos.y,
                  0., 0., player->solid->dir);
+
+  player->credits -= ship->price; // Auch! Paying is hard!
+
+  shipyard_update(NULL);
 }
 
 static void shipyard_yours(char* str) {
@@ -610,16 +618,19 @@ static void shipyard_yoursUpdate(char* str) {
   char* shipname;
   Pilot* ship;
   char* loc;
+  int price;
 
   shipname = toolkit_getList(terciary_wid, "lstYourShips");
   if(strcmp(shipname, "None")==0) return; // No ships.
   ship = player_getShip(shipname);
   loc = player_getLoc(ship->name);
+  price = shipyard_yoursTransportPrice(shipname);
 
   // Update the image.
   window_modifyImage(terciary_wid, "imgTarget", ship->ship->gfx_target);
 
-  credits2str(buf2, shipyard_yoursTransportPrice(shipname), 2); // Transport.
+  // Update text.
+  credits2str(buf2, price, 2); // Transport.
 
   credits2str(buf3, 0, 2); // Sell price.
   snprintf(buf, 256,
@@ -647,6 +658,18 @@ static void shipyard_yoursUpdate(char* str) {
   buf4 = pilot_getOutfits(ship);
   window_modifyText(terciary_wid, "txtDOutfits", buf4);
   free(buf4);
+
+  // Button disabling.
+  if(strcmp(land_planet->name, loc)) {
+    // Ship not here.
+    window_disableButton(terciary_wid, "btnChangeShip");
+    if(price > player->credits)
+      window_disableButton(terciary_wid, "btnTransportShip");
+    else window_enableButton(terciary_wid, "btnTransportShip");
+  } else {
+    window_enableButton(terciary_wid, "btnChangeShip");
+    window_disableButton(terciary_wid, "btnTransportShip");
+  }
 }
 
 static void shipyard_yoursChange(char* str) {